found: Prokofiev, S. Soviet diary 1927 and other writings, 1992, c1991: CIP t.p. (Oleg Prokofiev)
found: New York Times, Aug. 30, 1998 (Oleg Prokofiev, 69, artist and son of composer; d. Aug. 20, 1998, island of Guernsey in the English Channel; second son of the composer b. 1928)
found: The Independent WWW site, Sept. 19, 2011: obituary published Aug. 26, 1998 (Oleg Prokofiev; Oleg Sergevich Prokofiev; b. Dec. 14, 1928, Paris, d. Aug. 20, 1998, Alderney, Channel Islands; artist, painter, sculptor, and poet; son of composer Sergei Prokofiev; awarded a fellowship in the Fine Arts Department of Leeds University (from 1972 to 1974))
found: Russian Wikipedia, Sept. 19, 2011 (Прокофьев, Олег Сергеевич = Prokofev, Oleg Sergeevich; b. Dec. 14, 1928, Paris, d. Aug. 20, 1998, Guernsey; Soviet and British artist, sculptor, poet)