Jan Pallay, Hugo Berghmans
H. Rashidezadeh, K. Hung, Baochuan Guo
P.S. Theocaris, V. Kefalas, G. Spathis
Gopalakrishna Keshavanarayana, Canchi Divakar, Krishna Venkatesh [...]
Elvis Mbou Tiaya, Claude Takoumbe, Gilbert Tchemou [...]
Issam S. Jalham
Jianlin Xu, Xiaoqi Liu, Shibo Ren [...]
Ayesha Kausar
A. Krüger, R. Fuhrmann, F. Jung [...]
, Gilbert Tchemou , Xiaoqi Liu, Shibo Ren 
