Litologi︠i︡a karbonovykh otlozheniĭ Dzhezkazganskoĭ vpadiny i genezis plastovykh sulʹfidnykh rud - Druzhinin, Igorʹ Pavlovich (Trudy (Geologicheskiĭ institut (Akademi︠i︡a nauk SSSR)), 1973)