Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies
if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the
same subfield and year (this is the minimum needed to enter the top 1%, not the average
within it), or reaches the top citation threshold in at least one of its specific research
topics.
Zeros of sampled systems
1984678 citationsKarl Johan Åström, Per Hagander et al.Automaticaprofile →
Peers — A (Enhanced Table)
Peers by citation overlap · career bar shows stage (early→late)
cites ·
hero ref
This map shows the geographic impact of Per Hagander'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 Per Hagander with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Per Hagander more than expected).
This network shows the impact of papers produced by Per Hagander. 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 Per Hagander. The network helps show where Per Hagander may publish in the future.
Co-authorship network of co-authors of Per Hagander
This figure shows the co-authorship network connecting the top 25 collaborators of Per Hagander.
A scholar is included among the top collaborators of Per Hagander 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 Per Hagander. Per Hagander is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Andersson, Lena, et al.. (2002). Cultivations of Vibrio cholerae using probing control of glucose feeding. Lund University Publications (Lund University).
6.
Velut, Stéphane & Per Hagander. (2002). Analysis of a Probing Control Strategy. Lund University Publications (Lund University). 7602.
7.
Axelsson, Jan Peter, et al.. (2002). Evaluation of a Probing Feeding Strategy in Large Scale Cultivations. 7601.2 indexed citations
Åkesson, Mats & Per Hagander. (1998). Control of Dissolved Oxygen in Stirred Bioreactors. Lund University Publications (Lund University). 7571.5 indexed citations
10.
Hansson, Anders & Per Hagander. (1994). On the Existence of Minimum Upcrossing Controllers. Lund University Publications (Lund University).1 indexed citations
11.
Hansson, Anders & Per Hagander. (1994). Discrete Time LQ Control in Case of Dynamically Redundant Inputs.1 indexed citations
12.
Hagander, Per. (1993). Comment on `Conditions for Stable Zeros of Sampled Systems'. IEEE Transactions on Automatic Control. 38(5). 830–830.7 indexed citations
13.
Gustafsson, Kjell & Per Hagander. (1991). Discrete-Time LQG with Cross-Terms in the Loss Function and the Noise Description. Lund University Publications (Lund University).6 indexed citations
Mattìasson, Bo, Carl Fredrik Mandenius, Jan Peter Axelsson, Olle Holst, & Per Hagander. (1984). Control of Baker's Yeast Production Based on Ethanol Measurement. Lund University Publications (Lund University).3 indexed citations
17.
Åström, Karl Johan, Per Hagander, & Jan Sternby. (1984). Zeros of sampled systems. Automatica. 20(1). 31–38.678 indexed citations breakdown →
18.
Mandenius, Carl Fredrik, et al.. (1982). Computer Control of Sucrose Concentration in a Fermentor with Continuos Flow.2 indexed citations
19.
Wittenmark, Björn, Ivar Gustavsson, & Per Hagander. (1980). STUPID – Implementation of a Self-Tuning PID-Controller. Lund University Publications (Lund University).
20.
Åström, Kalle, Per Hagander, & Jan Sternby. (1980). Zeros of sampled systems. 1077–1081.117 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.