Petrow et al. Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1957 , p. 310,315 Full Text Show Details Sommer et al. Journal of the American Chemical Society, 1954 , vol. 76, p. 1609,1611 Journal of the American Chemical Society, 1957 , vol. 79, p. 2764,2768