1. J.L. Atwood, J.E.D. Davies, D.D. Macnicol, and F. Vogtle (eds.): Solid-state Supramolecular Chemistry: Crystal Engineering in Comprehensive Supramolecular Chemistry, Vol. 6, Pergamon, (1996)
2. (a) F. Toda, K. Tanaka, and T.C.W. Mak: Chem. Lett. 2085 (1984).
3. (b) F. Toda, K. Tanaka, and S. Nagamatsu, Tetrahedron Lett. 25, 4929 (1984).
4. (c) G.H. Lee, Y. Wang, K. Tanaka, and F. Toda: Chem. Lett., 781 (1988).
5. (d) F. Toda, K. Mori, Z. Stein, and I. Goldberg, J. Org. Chem. 53, 572 (1988).