Osorio, J., H. Pachajoa, and P. Hurtado. “DNA Concentration and Purity of Blood Samples Stored in Whatman FTA Paper Between 1 to 3 Years”. Revista Estomatología, vol. 21, no. 1, Sept. 2017, pp. 35-38, doi:10.25100/re.v21i1.5756.