RyazanovV. I. “Solution to the Reich–Walczak Conformity Problem According to Belynsky–Lavrentyev ”. Ukrains’kyi Matematychnyi Zhurnal 44, no. 10 (October 1, 1992): 1406-1411. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/8239.