Elena Burdina, A. N., Kozhayeva, S., & Leonid Bulyga, Z. T. (2019). Diagnostics Of Pedagogical Staff Readiness For Teaching Natural Sciences In English. Opción, 35(88), 321-345. Recuperado a partir de https://mail.produccioncientificaluz.org/index.php/opcion/article/view/24207