GENERALIZED FIELD MODELS FOR LEPTONS AND BARYONS ArticleChakrabarti S.Solitons and nonlinear systems. 1986. С. 159-166
GROUP-THEORETIC METHODS IN PHYSICS, VOL. 2 (RUSSIAN) (JŪRMALA, 1985) Conference proceedings"Nauka", Moscow.
SET-VALUED ANALYSIS AND DIFFERENTIAL INCLUSIONS (PAMPOROVO, 1990) Conference proceedingsBirkhäuser Boston, Boston, MA.