G. A. Domínguez Alvarado, M. G. Quintero Arias, M. Bermúdez Mantilla, L. E. López Gómez, and L. Hurtado-Quiros, “Methylene blue, an option for minimally invasive pre-procedural colorectal cancer marking. Case Report”, Rev. Médica Risaralda, vol. 29, no. 1, Jun. 2023.