REACTION OF INDOLIZINES WITH ELEMENTAL SULFUR ArticleProstakov N.S., Soldatenkov A.T., Bagdadi M.V., Brindkha O.S., Kuznetsov V.I., Rezakov V.A., Fomichev A.A.Chemistry of Heterocyclic Compounds. Том 20. 1984. С. 1128-1132
