1. Ferroelectricity in lead monohydrogen phosphate, PbHPO4, and the deuterated form, PbDPO4
2. Ferroelectricity in PbHAsO4 and PbDAsO4
3. Březina, B. 1976. Abstract Book ECCG-1. September12–181976, Zurich.
4. Bhat, Girish'a, H. L. and Narayanan, P. S. 1977. “Crystal growth and characterization of monohydrogen phosphates of Pb, Ba, Sr and Ca,“. National Conference on Crystallography. Jan.1977, Madras, India. See also:
5. Fousková, A. private communication