J. Marquina, N. Sierralta, M. Quintero, C. Rincón, M. Morocoima, and E. Quintero, “Study of the critical-fields and the thermal broadening in polycrystalline Ag$_2$FeGeSe$_4$ semiconducting compound”, Rev. Mex. Fís., vol. 63, no. 5 Sept-Oct, pp. 456–0, Jan. 2017.