Ortiz, J.L.(Manager Center of Excellence for Production) - "Subsurface Surface Integrated Optimization - Creating Value for PDVSA While Keeping Low Production Costs" - First Technology Conference PDVSA Operating Agreements Partner Companies - 10-11 May 2001 - Gran Salon - PDVSA CIED Caracas Venezuela
Cedeño, M. and Ortiz J.L.: "SOLAG: An Intelligent Gas Lift Optimization System for Continuous and Intermittent Gas Lift Wells", Paper SPE-26972 presented in the III SPE Latin-American Conference (LAPEC) .Buenos Aires. Argentina. April, 1994. Link: https://doi.org/10.2118/26972-MS>
Ortiz,J.L. and Prato,A.: "Lessons Learned During the Development of a Gas Lift Troubleshooting Expert System: A Case History ", Conference on Artificial Intelligence in Petroleum Exploration and Production (CAIPEP), Dallas, Texas, USA, May 1993.Link_to_Paper