1. A. F. Wells , Structural Inorganic Chemistry, Oxford University Press, Oxford, 5th edn., 1984
2. A. F. Wells , Three-dimensional Nets and Polyhedra; Wiley, New York, 1977
3. A. F. Wells , Further Studies of Three-dimensional Nets, ACA monograph 8, 1979
4. Topochemistry of zeolites and related materials. 1. Topology and geometry
5. J. V. Smith , Tetrahedral Frameworks of Zeolites, Clathrates and Related Materials, Landolt-Börnstein New Series IV/14 Subvolume A, Springer, Berlin, 2000