Loet Leydesdorff Ping Zhou 0001 Are the contributions of China and Korea upsetting the world system of science? 617-630 2005 63 Scientometrics 3 https://doi.org/10.1007/s11192-005-0231-1 https://www.wikidata.org/entity/Q57396956 db/journals/scientometrics/scientometrics63.html#LeydesdorffZ05