Sonawane, H. R.; Nanjundiah, B. S.; Kulkarni, D. G.; Ahuja, Jaimala R.
Tetrahedron, 1988 , vol. 44, # 23 p. 7319 - 7324

Sonawane, Harikisan; Bellur, Nanjundiah S.; Kulkarni, Dilip G.; Ayyangar, Nagaraj R.
Tetrahedron, 1994 , vol. 50, # 4 p. 1243 - 1260