Citation: Palkina, K.K.; Chudinova, N.N.; Balagina, G.M.; Maksimova, S.I.; Chibiskova, N.T. (1982). Synthesis of acid polyphosphates of rare-earth metals and the structure of Er H (P O3)4. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy, 18, pp. 1561-1566.