Norodin A. Rangaig
Raghda A.M. Attia, Dianchen Lu and Mostafa M.A. Khater
Tzanko Tzankov, Rosen Iliev, Boyko Ranguelov
M.A. Jafarov, E.F. Nasirov, S.A.Jahangirova, R.M.Mammadov
S.A. Orlov
Victor V. Apollonov, Sergei M. Silnov
T. P. Suresh, and K. M. Udayanandan
J. Morales, G. Ovando, J. López-Bonilla, R. López-Vázquez.