Resonant x-ray scattering study of charge superstructures in layered L a2-x C axCo O4±d (0.4=x=0.7) and L a1.5 S r0.5Co O4 compounds

For financial support, we thank the Spanish Ministerio de Economia y Competitividad Project No. MAT2015-68760-C2-1-P and Diputacion General de Aragon Project No. E69.