Gubergrits, N. B., G. M. Lukashevich, N. V. Byelyayeva, and A. Y. Klochkov. “Pancreatic Cancer in the Light of Lev Tolstoy’s Mastery”. Herald of Pancreatic Club, Vol. 2, no. 51, May 2021, pp. 76-78, https://vkp.org.ua/index.php/journal/article/view/240.