Sommer et al.
Journal of the American Chemical Society, 1954 , vol. 76, p. 801

Sommer et al.
Journal of the American Chemical Society, 1954 , vol. 76, p. 801

Petrow et al.
Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, 1957 , p. 310,315
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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

Gmelin Handbook: Si: MVol.C, 50, page 143 - 146