Bakan, A. G. “On the Completeness of Algebraic Polynomials in the Spaces $L_p (ℝ, dμ)$”. Ukrains’kyi Matematychnyi Zhurnal 61, no. 3 (March 25, 2009): 291–301. Accessed April 11, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/3020.