Zhavrin, Y., Beketaуeva M., and O. Fedorenko. “CALCULATION OF DIFFUSIVE PROCESSES FOR SOME NATURAL HYDROCARBONIC GAS MIXTURES INTO AIR”. Recent Contributions to Physics, vol. 2018, no. 3, Nov. 2018, pp. 15-21, https://bph.kaznu.kz/index.php/zhuzhu/article/view/1013.