Eldyaeva, N. A., & Galina A. Sharinova, E. S. K. V. M. R. (2019). Modeling the duration of return labor migration (by the example of kalmykia). Opción, 34, 773-797. Recuperado a partir de https://www.produccioncientificaluz.org/index.php/opcion/article/view/30198