Affiliation: | (1) Instytut Fizyki im. M. Smoluchowskiego, Uniwersytet Jagiello´nski, ul. Reymonta 4, 30–059 Kraków, Poland;(2) School of Mathematical Sciences, Division of Theoretical Mechanics, University of Nottingham, University Park, Nottingham, NG7 2RD, United Kingdom;(3) Polska Akademia Nauk, Centrum Fizyki Teoretycznej, Al. Lotników 32/44, 02–668 Warsaw, Poland |