... R, Suresh Kumar M, Kumaran D and Pon- nuswamy MN (2002) Indian J. Chem 41B ... j) Suku- mar N, Ponnuswamy MN, Thenmozhiyal JC and Jeyaraman R (1995) J Chem Cryst 25 ... Zeits Fur Kristallographie 209:823; (q) Sukumar N (1994) PhD thesis, University of Madras, India ...