Cobaleda, G., Ehrlich, R., & Ferm, J. B. (1997). Relationship between petrographic pore types and core measurements in sandstones of the Monserrate formation, upper Magdalena valley, Colombia. CT&F - Ciencia, Tecnología Y Futuro, 1(3), 5–17. https://doi.org/10.29047/01225383.585