found: Theodorakis, M. Symphonie no 7 [SR] p1984:container (Vladimir Proudnikov, singer)
found: Kutavičius, B. Lokys [SR] p2002:container (Vladimiras Prudnikovas; singing the role of the Professor)
found: Virtual concert agency, WWW site, July 2, 2003:singers (Vladimiras Prudnikovas, Lithuanian bass)
found: Lithuanian National Opera and Ballet Theatre, WWW site, July 2, 2003:management (Vladimiras Prudnikovas, artistic director of the opera, bass)
notfound: Muzykalʹnai︠a︡ ėnt︠s︡iklopedii︠a︡, 1973-1982.