1. Narasimhachari and SeshadriProc. Ind. Acad. Sci., A, 1949,29, 265.
2. Chakravarti, Kundu and GhoshJ.I.C.S., 1948, 329.
3. VenkataramanScience and Culture, 1942-43,8, 464. Chakravarti, and GhoshJ.I.C.S., 1944, 171.
4. Chakravarti and BharIbid. Science and Culture, 1945, 301.
5. AsahinaArch. Pharm., 1908,246, 259.