Citation: Grizik, A.A.; Eliseev, A.A.; Tolstova, V.A.; Borodulenko, G.P. (1978). Homogeneity range of rare-earth element sulphides with a structure of Th3P4 type. Russian Journal of Inorganic Chemistry (= Zhurnal Neorganicheskoi Khimii), 23, pp. 330-332.