Hans �gren

737 total citations
10 papers, 581 citations indexed

About

Hans �gren is a scholar working on Atomic and Molecular Physics, and Optics, Pharmacology and Physiology. According to data from OpenAlex, Hans �gren has authored 10 papers receiving a total of 581 indexed citations (citations by other indexed papers that have themselves been cited), including 4 papers in Atomic and Molecular Physics, and Optics, 2 papers in Pharmacology and 2 papers in Physiology. Recurrent topics in Hans �gren's work include Advanced Chemical Physics Studies (3 papers), Spectroscopy and Quantum Chemical Studies (2 papers) and Treatment of Major Depression (2 papers). Hans �gren is often cited by papers focused on Advanced Chemical Physics Studies (3 papers), Spectroscopy and Quantum Chemical Studies (2 papers) and Treatment of Major Depression (2 papers). Hans �gren collaborates with scholars based in Sweden, Ukraine and Denmark. Hans �gren's co-authors include Olav Vahtras, Vincenzo Carravetta, Lars G. M. Pettersson, Leif Bertilsson, Chiaki Kawanishi, Jon Skarstein, K. Behnke, Esa Leìnonen, Frank Niklasson and Lars Terenius and has published in prestigious journals such as Psychopharmacology, Theoretical Chemistry Accounts and International Journal of Quantum Chemistry.

In The Last Decade

Hans �gren

10 papers receiving 546 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name	h						Papers	Cites
Hans �gren Sweden	9	154	143	107	84	69	10	581
C. Gardner United States	19	155 1.0×	33 0.2×	62 0.6×	15 0.2×	40 0.6×	60	1.2k
René Pool Netherlands	21	174 1.1×	25 0.2×	48 0.4×	10 0.1×	371 5.4×	56	1.3k
H. Donald Burns United States	18	23 0.1×	74 0.5×	100 0.9×	14 0.2×	98 1.4×	42	1.3k
John S. Martin United States	20	145 0.9×	22 0.2×	14 0.1×	16 0.2×	88 1.3×	74	1.0k
Ronald J. Voll United States	21	85 0.6×	78 0.5×	32 0.3×	9 0.1×	85 1.2×	84	1.4k
M. Kimura Japan	14	128 0.8×	193 1.3×	38 0.4×	7 0.1×	10 0.1×	35	657
Prashant N. Patil India	16	21 0.1×	51 0.4×	9 0.1×	39 0.5×	135 2.0×	61	744
Klaus Ackermann Germany	23	30 0.2×	32 0.2×	62 0.6×	7 0.1×	67 1.0×	62	1.5k
Timo Lotta Finland	13	184 1.2×	78 0.5×	265 2.5×	60 0.7×	37 0.5×	21	1.3k

Countries citing papers authored by Hans �gren

Since Specialization

Citations

This map shows the geographic impact of Hans �gren's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Hans �gren with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Hans �gren more than expected).

Fields of papers citing papers by Hans �gren

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Hans �gren. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Hans �gren. The network helps show where Hans �gren may publish in the future.

Co-authorship network of co-authors of Hans �gren

This figure shows the co-authorship network connecting the top 25 collaborators of Hans �gren. A scholar is included among the top collaborators of Hans �gren based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Hans �gren. Hans �gren is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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10 of 10 papers shown

Ehnvall, Anna, et al.. (2004). HPA axis activation determined by the CRH challenge test in patients with few versus multiple episodes of treatment?refractory depression. European Archives of Psychiatry and Clinical Neuroscience. 254(6). 349–355. 25 indexed citations

�gren, Hans, et al.. (2004). Increased incidence of CYP2D6 gene duplication in patients with persistent mood disorders: ultrarapid metabolism of antidepressants as a cause of nonresponse. A pilot study. European Journal of Clinical Pharmacology. 59(11). 803–807. 109 indexed citations

Minaev, Boris F., et al.. (2004). Ab initio calculations of vibronic activity in phosphorescence microwave double resonance spectra of p-dichlorobenzene. Theoretical Chemistry Accounts. 113(1). 15–27. 10 indexed citations

Leìnonen, Esa, et al.. (1999). Efficacy and tolerability of mirtazapine versus citalopram: a double-blind, randomized study in patients with major depressive disorder. International Clinical Psychopharmacology. 14(6). 329–337. 117 indexed citations

Minaev, Boris F. & Hans �gren. (1999). Spin uncoupling in ethylene activation by palladium and platinum atoms. International Journal of Quantum Chemistry. 72(6). 581–596. 8 indexed citations

Luo, Yi, Daniel Jönsson, Patrick Norman, et al.. (1998). Some recent developments of high-order response theory. International Journal of Quantum Chemistry. 70(1). 219–239. 29 indexed citations

�gren, Hans, Vincenzo Carravetta, Olav Vahtras, & Lars G. M. Pettersson. (1997). Direct SCF direct static-exchange calculations of electronic spectra. Theoretical Chemistry Accounts. 97(1-4). 14–40. 159 indexed citations

Knuts, Sören, Boris F. Minaev, Hans �gren, & Olav Vahtras. (1994). The phosphorescence of benzene obtained byab initio and semi-empirical calculations. Theoretical Chemistry Accounts. 87(4-5). 343–371. 22 indexed citations

�gren, Hans & Frank Niklasson. (1988). Creatinine and creatine in CSF: indices of brain energy metabolism in depression. Journal of Neural Transmission. 74(1). 55–59. 43 indexed citations

10.

Terenius, Lars, et al.. (1977). Naloxone (Narcan�) treatment in depression: Clinical observations and effects on CSF endorphins and monoamine metabolites. Psychopharmacology. 54(1). 31–33. 59 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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