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DUDRIC, R. .; SOUCA, G. .; GOGA, F. . MAGNETOCALORIC EFFECT IN La1.2R0.2Ca1.6Mn2O7 (R=Tb, Dy, Ho, Er) PEROVSKITES SYNTHESIZED BY SOL-GEL METHOD. Studia UBB Physica 2022, 67, 9-16.