Ivanov, D., Mikhailovich, S. V., Stepanovich, M. A., & Stanislavovna, M. S. (2019). The concept of spirit in the structure of Yuri Shevchuk’s worldview. Opción, 34, 374-394. Recuperado a partir de https://www.produccioncientificaluz.org/index.php/opcion/article/view/24353