Sonn
Chemische Berichte, 1918 , vol. 51, p. 821

Corsaro, A.; Perrini, G.; Chiacchio, U.; Purello, G.; Guerrera, F.
Phosphorus, Sulfur and Silicon and the Related Elements, 1991 , vol. 63, # 1/2 p. 103 - 109

Sarkar, Mili; Chattopadhyay, S.; Mahalanabis, Kumar K.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1986 , vol. 25, p. 1133 - 1137

Sarkar, Mili; Chattopadhyay, S.; Mahalanabis, Kumar K.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1986 , vol. 25, p. 1133 - 1137