12th general conference of the condensed matter division : [Praha 6-9 april 1992, European physical society, Union of Czechoslovak mathematicians and physicists - physical section [a] Institute of Physics Czechoslovak Academyof sciences : abstracts] / editors B. Velický, V. Vorlíček, K. Závěta .  Prague :  Union of Czechoslovak Mathematicians and Physicists,  1992 .  LII, 333, 14 s.