Sadykova, S. T., and Z. Saadat. “The Secret of Economic Development in Backward Countries. Секреты экономического рaзвития в отстaлых стрaнaх”. Journal of Economic Research &Amp; Business Administration, vol. 115, no. 3/2, Nov. 2016, https://be.kaznu.kz/index.php/math/article/view/1450.