M. Popovici, W.B. Yelon
T. Vogt, U. Wildgruber, L. Passell [...]
Pavol Mikula, Miroslav Vrána, Vasyl Ryukhtin [...]
Ji-Myung Ryu, J.M. Sungil Park, Baek-Seok Seong
Konrad Blinowski, Stanislaw Bednarski, Mariusz Wieczorkowski
B.S. Seong, E. Shin, C.H. Lee [...]
H. Conrad, TH. Brückel, A. Budwig [...]
Pavol Mikula, Jan Šaroun, Pavel Strunz [...]
J.D. Axe, S. Cheung, D.E. Cox [...]
M. Popovici, K.W. Herwig, R. Berliner [...]
, Miroslav Vrána, Vasyl Ryukhtin 
