1. J. Gažo, R. Boča, E. Jóna, M. Kabešová, L. Macáškovä, J. Šima, P. Pelikán, and F. Valach:Coord. Chem. Rev. 43, 87 (1983).
2. E. Jóna, F. Valach, J. Gazo, E. Fendrich, and T. Šramko:Koord. Khimiya 9, 86 (1983) (in Russian).
3. W. Kemula, J. Lipkowski, and D. Sybilska:Roczniki Chem. 48, 3 (1974).
4. F. Paulik and J. Paulik:Thermochim. Acta 100, 23 (1986).
5. J. Lipkowski: ‘Structure and physico-chemical behaviour of clathrates formed by the Ni(NCS)2(4-Methylpyridine)4 complex’. Zaklad narodowy imienia Ossoliňskich, Conference 81, Wroclaw, 1980.