Bullock et al.
Journal of the American Chemical Society, 1956 , vol. 78, p. 3693

Viout; Rumpf
Bulletin de la Societe Chimique de France, 1959 , p. 1123,1126
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Okumura et al.
Bulletin of the Chemical Society of Japan, 1957 , vol. 30, p. 194
Bulletin of the Chemical Society of Japan, 1959 , vol. 32, p. 886

Viout; Rumpf
Bulletin de la Societe Chimique de France, 1959 , p. 1123,1126