1. Iwamoto T (1984) The Hofmann-type and related inclusion compounds. In: Atwood JL, Davies JED, MacNicol DD (eds) Inclusion compounds, vol 4. Academic Press, London, pp 29–57
2. Cernak J, Chomic J, Baloghova D, Dunaj-Jurco M (1988) Acta Cryst C44:1902
3. Rüegg M, Ludi A (1971) Theor Chim Acta 20:193
4. Cernak J, Potacnak I, Chomic J (1990) Acta Cryst C46:1098
5. Muga I, Vitoria P, Reinoso S, Gutierrez-Zorrilla JM (2003) Acta Cryst E59:m576