Galindo, S., L. González-Tovan, ., and M. Guía-García. “An Electron Paramagnetic Resonance (EPR) Study of a Molybdenum-Phthalocyanine Powder”. Revista Mexicana De Física, vol. 32, no. 3, Jan. 1985, pp. 435-53, https://rmf.smf.mx/ojs/index.php/rmf/article/view/1894.