作者单位:
Danube Research Institute of the Hungarian Academy of Sciences, Jávorka Sándor u. 14, 2131, Gd, Hungary
[1]
Hungarian Scientific Research Fund Office, Czuczor u. 10, 1093, Budapest, Hungary
[2]
Szent István University, Páter Károly u. 1, 2100, Godollo, Hungary
[3]
Department of Mathematics and Informatics, Corvinus University of Budapest, Villányi út 29-43, 1118, Budapest, Hungary
[4]
发布时间
2013-11-20