You are right, it is difficult to find information about Butzko in the net, I had this problem trying to find something about his more recent works, for instance his sixth symphony with the intriguing title "Leaving Russia". As it is a favorite of mine I will try to translate with the help of Google translator, his entry in the booklet written by Jacques di Vanni "1953-1983, 30 ans de musique soviétique" (sorry, but my French is better than my English).
"Butzko (Yuri Markovich) composer, born in Lubny (Poltava country, Ukraine) in 1938, graduated at the Moscow Conservatory (piano, choral chant and composition with S.A. Balassanian) and as historian at the Pedagogic Institute (1955-66). The ancient Russian history and the choral chant have a essential place in his production; modal music, ancient liturgies, archaism taken from several folkloric sources from his natal Ukraine and the North of Russia. Stravinsky's "Russian period" influence is also manifest in his style. He is one of the foremost representants of the "Old Russia" school. Several quasi legendary personages as the leader of the peasants revolts under the Empress Catherine, Pugachev or the warrior saints Boris and Lev, and also themes taken from Gogol and Dostoievsky, demonstrate a specifically Russian thematic.
His borrowings from Western techniques are rare, and unlike the soviet composers influenced by the post-serialism and the short form, he prefers to compose works of great length (Polyphonic Concert for 4 pianos, 2h 30)".
Follows a list of principal works covered much better by eschiss1
"Butzko (Yuri Markovich) composer, born in Lubny (Poltava country, Ukraine) in 1938, graduated at the Moscow Conservatory (piano, choral chant and composition with S.A. Balassanian) and as historian at the Pedagogic Institute (1955-66). The ancient Russian history and the choral chant have a essential place in his production; modal music, ancient liturgies, archaism taken from several folkloric sources from his natal Ukraine and the North of Russia. Stravinsky's "Russian period" influence is also manifest in his style. He is one of the foremost representants of the "Old Russia" school. Several quasi legendary personages as the leader of the peasants revolts under the Empress Catherine, Pugachev or the warrior saints Boris and Lev, and also themes taken from Gogol and Dostoievsky, demonstrate a specifically Russian thematic.
His borrowings from Western techniques are rare, and unlike the soviet composers influenced by the post-serialism and the short form, he prefers to compose works of great length (Polyphonic Concert for 4 pianos, 2h 30)".
Follows a list of principal works covered much better by eschiss1