Praveen Kumar, K; Muthiah, C; Kumaraswamy, Sudha; Kumara Swamy
Tetrahedron Letters, 2001 , vol. 42, # 18 p. 3219 - 3221

Morita, Iwao; Chokai, Shoichi; Tsuda, Masami; Kise, Masahiro; Sugiyama, Makoto
Chemical and Pharmaceutical Bulletin, 1988 , vol. 36, # 3 p. 1135 - 1138

Ovchinnikov, V. V.; Safina, Yu. G.; Cherkasov, R. A.; Karataeva, F. Kh.; Pudovik, A. N.
J. Gen. Chem. USSR (Engl. Transl.), 1988 , vol. 58, # 9 p. 2066 - 2080,1841 - 1852