Barrero, C. A., A. L. Morales, J. Mazo-Zuloaga, F. Jaramillo, G. Pérez, D. M. Escobar, C. Arroyave, J. Tobón, P. M. Montoya, L. Osorio, R. E. Vandenberghe, and J. M. Greneche. 2003. “Synthesis and Mössbauer Characterization of Cu and Cr Doped Magnetites”. Revista De Metalurgia 39 (Extra):62-67. https://doi.org/10.3989/revmetalm.2003.v39.iExtra.1098.