Rodríguez, Edwin, and Jaime Orjuela. “Feasibility to Apply the Steam Assited Gravity Drainage (sagd) Technique in the country’s Heavy Crude-Oil Fields”. CT&F - Ciencia, Tecnología Y Futuro, vol. 2, no. 5, Dec. 2004, pp. 7-22, doi:10.29047/01225383.515.