Pineda León, E., M. Aliabadi, and M. Ortiz-Dominguez. “Boundary Element Analysis for Primary and Secondary Creep Problems”. Revista Mexicana De Física, vol. 54, no. 5, Jan. 2008, pp. 341-0, https://rmf.smf.mx/ojs/index.php/rmf/article/view/3630.