Nangia, A.; Chandrakala, P. S.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1994 , vol. 33, # 6 p. 516 - 519

Takemura, Tetsuo; Hosoya, Yoshiko; Mori, Nobuo
Canadian Journal of Chemistry, 1990 , vol. 68, # 4 p. 523 - 529

Tanimoto, Shigeo; Jo, Shigeo; Sugimoto, Toyonari; Okano, Masaya
Bulletin of the Chemical Society of Japan, 1981 , vol. 54, # 10 p. 3237 - 3238