Hamada; Hara; Kawai; Kohno; Shioiri
Tetrahedron, 1991 , vol. 47, # 40 p. 8635 - 8652

Chatterjea, J. N.; Singh, K. R. R. P.; Jha, I. S.; Prasad, Y.; Shaw, S. C.
Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry, 1986 , vol. 25, p. 796 - 798