1. Kanazawa, T., Inorganic Phosphate Materials, Amsterdam: Elsevier, 1989.
2. Shchegrov, L.N., Fosfates of dvukhvalentnykh metallov (Phosphates of Divalent Metals), Kiev: Naukova Dumka, 1987.
3. Konstant, Z.A., and Dindune, A.P., Fosfates of dvukhvalentnykh metallov (Phosphates of Divalent Metals), Riga: Zinatne, 1987.
4. Kokhanovskii, V.V., and Prodan, E.A., Zh. Neorg. Khim., 1988. vol. 33, no. 3, pp. 761–765.
5. Kokhanovskii, V.V., Vestsi Akad. Nauk Bel. SSR. Ser. Khim. Navuk, 1990, no. 5, pp. 3–8.