1. C. D. Gutsche: in J. F. Stoddart (Ed.),Calixarenes, Monographs in Supramolecular Chemistry, Vol. 1, The Royal Society of Chemistry, London (1989).
2. C. D. Gutsche and B. Dhawan:J. Org. Chem. 48, 1536 (1983).
3. F. Arnaud-Neu, E. M. Collins, M. Deasy, G. Ferguson, S. J. Harris, B. Kaitner, A. J. Lough, M. A. McKervey, E. Marques, B. L. Ruhl, M. J. Schwing-Weill, and E. M. Seward,J. Am. Chem. Soc. 111, 8681 (1989).
4. M. J. Schwing, and M. A. McKervey: in Topics in Inclusion Phenomena:Calixarenes: A Versatile Class of Macrocyclic Compounds, J. Vicens and V. Böhmer (Eds.), Kluwer Acad. Publishers, (1990).
5. G. M. Sheldrick,SHELX86, a computer program for crystal structure determination, University of Geottingen (1986).