Citation: Donika, F.G.; Semiletov, S.A.; Radautsan, S.I.; Mustya, I.G.; Donika, T.V.; Kiosse, G.A. (1971). Crystal structure of the double-pack polytype Zn In2 S4 (II)a, and more careful determination of the structure of the triple-pack polytype Zn In2 S4 (III)a. Soviet Physics, Crystallography (= Kristallografiya), 16, pp. 190-192.