Jaramillo Sánchez, Gustavo Adolfo, et al. “The Laboratory in Hyperlipidemias. Measurement and Comparison of Lipoproteins by Two Laboratory Methods”. Medicina UPB, vol. 9, no. 1, June 1990, pp. 29-36, https://revistas.upb.edu.co/index.php/medicina/article/view/5585.