Nardin, Dmitry Sergeevich, et al. “Increasing Economic Efficiency of Producing Wheat in the West Siberia and South Ural As a Factor of Developing Import Substitution”. International Review of Management and Marketing, vol. 6, no. 4, Oct. 2016, pp. 772-8, https://econjournals.org.tr/index.php/irmm/article/view/3073.