Pyalchenkov, V. A., D. V. Pyalchenkov, y L. I. Nikitina. «Influence of Test Modes and Accuracy of Manufacturing a Roller Cone Bit on Loading of Its Elements». Amazonia Investiga, vol. 8, n.º 23, octubre de 2019, pp. 613-20, https://amazoniainvestiga.info/index.php/amazonia/article/view/909.