STEEL - LUGOVYKH VALERIJ E,SU; SHUR EVGENIJ A,SU; DUSEVICH VLADIMIR M,SU; POPTSOV MIKHAIL E,SU; TSARENKO ALEKSANDR G,SU; STUDENOK ELENA S,SU; VODYANOV ALEKSANDR V,SU; FILIPPOV MIKHAIL A,SU (1989)