This map shows the geographic impact of Erkki Hellén'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 Erkki Hellén with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Erkki Hellén more than expected).
This network shows the impact of papers produced by Erkki Hellén. 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 Erkki Hellén. The network helps show where Erkki Hellén may publish in the future.
Co-authorship network of co-authors of Erkki Hellén
This figure shows the co-authorship network connecting the top 25 collaborators of Erkki Hellén.
A scholar is included among the top collaborators of Erkki Hellén 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 Erkki Hellén. Erkki Hellén is excluded from
the visualization to improve readability, since they are connected to all nodes in the network.
Sneck, Asko, Marja Pitkänen, Heli Kangas, Tekla Tammelin, & Erkki Hellén. (2011). New approach to classification of cellulose fibrils and suitable methods for their characterization. 15–15.5 indexed citations
10.
Ketoja, Jukka A., Erkki Hellén, Artem Kulachenko, et al.. (2010). Multi-scale modeling environment for nanocellulose applications. PolyPublie (École Polytechnique de Montréal).1 indexed citations
11.
Pitkänen, Marja, et al.. (2010). Nanofibrillar cellulose: In vitro study of cytotoxic and genotoxic properties. 246–261.13 indexed citations
Peltomäki, Matti, Erkki Hellén, & Mikko J. Alava. (2004). No self-similar aggregates with sedimentation. Journal of Statistical Mechanics Theory and Experiment. 2004(9). P09002–P09002.8 indexed citations
14.
Hellén, Erkki & Mikko J. Alava. (2002). Persistence in cluster-cluster aggregation. Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics. 66(2). 26120–26120.9 indexed citations
15.
Hellén, Erkki & Joachim Krug. (2002). Coarsening of sand ripples in mass transfer models. Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics. 66(1). 11304–11304.12 indexed citations
Hellén, Erkki, Mikko J. Alava, & K. J. Niskanen. (1997). Porous structure of thick fiber webs. Journal of Applied Physics. 81(9). 6425–6431.28 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.