Chołoniewski, Jan
Sienkiewicz, Julian
Dretnik, Naum
Leban, Gregor
Thelwall, Mike
Hołyst, Janusz A.
Funding for this research was provided by:
Horizon 2020 (691152)
Ministerstwo Nauki i Szkolnictwa Wyższego (34/H2020/2016)
Narodowe Centrum Nauki (2015/19/B/ST6/02612)
Russian Science Foundation (#17-71-30029)
Article History
Received: 29 June 2020
Accepted: 13 November 2020
First Online: 26 November 2020
Competing interests
: The authors declare no competing interests.