About the Authors

Lovro Šubelj

lovro.subelj@fri.uni-lj.si

Affiliation Faculty of Computer and Information Science, University of Ljubljana, Ljubljana, Slovenia

Marko Bajec

Affiliation Faculty of Computer and Information Science, University of Ljubljana, Ljubljana, Slovenia

Biljana Mileva Boshkoska

Affiliation Faculty of Information Studies in Novo mesto, Novo mesto, Slovenia

Andrej Kastrin

Affiliation Faculty of Information Studies in Novo mesto, Novo mesto, Slovenia

Zoran Levnajić

Affiliations Faculty of Computer and Information Science, University of Ljubljana, Ljubljana, Slovenia, Faculty of Information Studies in Novo mesto, Novo mesto, Slovenia

Competing Interests

The authors have the following interests: Thomson Reuters provided data for this study. There are no patents, products in development or marketed products to declare. This does not alter the authors' adherence to all the PLOS ONE policies on sharing data and materials.

Author Contributions

Conceived and designed the experiments: LS MB. Performed the experiments: LS. Analyzed the data: LS BMB AK. Contributed reagents/materials/analysis tools: AK. Wrote the paper: ZL LS.