Molina, R. E., Stock, J. M., Marín, Z., Stock, J., & Villarrea, L. E. (2006). Quantitative Spectral Classification. Analysis of K-M Giant Stars in the Visible and Near-IR region. Revista Mexicana de Astronomía y Astrofísica.

Molina, R. E., J. M. Stock, Z. Marín, J. Stock, and L. E. Villarrea. "Quantitative Spectral Classification. Analysis of K-M Giant Stars in the Visible and Near-IR Region." Revista Mexicana De Astronomía Y Astrofísica 2006.

Molina, R. E., et al. "Quantitative Spectral Classification. Analysis of K-M Giant Stars in the Visible and Near-IR Region." Revista Mexicana De Astronomía Y Astrofísica 2006.