Elena Burdina, Aiman Nurzhumbayeva, Sanim Kozhayeva, y Zhanna Temerbayeva, Leonid Bulyga. 2019. «Diagnostics Of Pedagogical Staff Readiness For Teaching Natural Sciences In English». Opción 35 (88), 321-45. https://produccioncientificaluz.org/index.php/opcion/article/view/24207.