Sandoval, M., H. Valderrama P, M. Sánchez M, D. Molina Velasco, and S. Muñoz N. “Low Field NMR As an Alternative Technique to Estimate of Density and Viscosity in Toluene-Heavy Oil Mixtures”. CT&F - Ciencia, Tecnología Y Futuro, Vol. 11, no. 2, Dec. 2021, pp. 17-26, doi:10.29047/01225383.366.