1. H. K. Henisch, “Crystal Growth in Gels”, Pennsylvania State University Press, USA (1970).
2. Advances in gel growth: A review
3. Growth and study of barium oxalate single crystals in agar gel
4. J.-M. Lehn, “Supramolucular Chemistry: Concepts and Prospectives”, VCH, New York (1995).
5. Dalton Discussion No. 3, “Inorganic Crystal Engineering”, J. Chem. Soc., Dalton Trans. 21 (2000).