by Radošević, S M, Pantić, M R, Kapor, D V, Pavkov-Hrvojević, M V, Škrinjar, M G
Published in Journal of physics. A, Mathematical and theoretical (16.04.2010)

by Radosevic, S M, Pantic, M R, Kapor, D V, Pavkov-Hrvojevic, M V, Skrinjar, M G
Published in arXiv.org (09.03.2010)