Buitrón Sánchez, B. E., Gómez Espinosa, C., Almazán Vázquez, E., Vachard, D., Laguarda-Figueras, A., & Solís-Marín, F. (2008). A review of the crinoid columnals (Echinodermata-Crinoidea) from the Carboniferous of Mexico.

Buitrón Sánchez, B. E., C. Gómez Espinosa, E. Almazán Vázquez, D. Vachard, A. Laguarda-Figueras, و F. Solís-Marín. A Review of the Crinoid Columnals (Echinodermata-Crinoidea) From the Carboniferous of Mexico. 2008.

Buitrón Sánchez, B. E., et al. A Review of the Crinoid Columnals (Echinodermata-Crinoidea) From the Carboniferous of Mexico. 2008.