A.V. Rubanovich, and V.A. Saenko. “Null Distribution of the Test Statistic for Model Selection via Marginal Screening: Implications for Multivariate Regression Analysis”. Global Journal of Science Frontier Research, vol. 21, no. G1, Jan. 2021, pp. 23-31, https://journalofscience.org/index.php/GJSFR/article/view/3022.