Authors: ARNOLD VI BEREZANSKII YM DALETSKII YL KUTATELADZE SS LAVRENTEV MM RESHETNYAK YG SEMENOV EM SKLYADNEV SA

Citation: Vi. Arnold et al., KREIN,SELIM,GRIGOREVICH (ON HIS 80TH BIRTHDAY), Russian Mathematical Surveys, 52(6), 1997, pp. 1349-1350