The effect of partial or total substitution of lanthanum by other cations has also been evaluated. For instance, the catalytic activity for CO oxidation of AFeO3 (A = La, Nd, Sm) related perovskites follows the order Nd > La > Sm, according to Porta et al and Ciambelli et al. Likewise, partial substitution of lanthanum by alkaline earths such as Sr , Ca or Ba has been also reported to remarkably enhance the catalytic performance of Fe perovskites-related oxides.