1. J.Róth, K.Seybold and T.Meisel, (under publication).
2. J.Róth, Thesis, PhD Dissertation, Technical University of Budapest, (1975).
3. J.Róth, Z.Halmos and T.Meisel, Thermal Analysis, Vol. 2. Proc. Fourth ICTA, Budapest (1974).
4. G. Pelzl andH. Sackmann, Molecular Crystals and Liquid Crystals, 15 (1971) 75.
5. R. Walter, Ber. Deut. Chem., 59 (1926) 963.