Potsyute, N. K.; Rasteikene, L. P.; Knunyants, I. L.
Bulletin of the Academy of Sciences of the USSR, Division of Chemical Science (English Translation), 1980 , vol. 29, p. 1678 - 1683
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1980 , # 10 p. 2363 - 2369