References
- St. Louis : Sigma Chemical Company . MO 63178 U.S.A.
- Ricci , A. , Baluchani , D. , Rossl , C. and Croisy , A. 1969 . Boll. Chim. Farm. , 27 : 279 and the references cited therein
- Gagan , J. M. F. and Lloyd , D. 1970 . J. Chem. Soc. [C] , : 2488