Rezounenko, A. V. “On the History of Our Journal: 50th Anniversary or 137th Ordinary Year of Publication?”. Visnyk of V. N. Karazin Kharkiv National University. Ser. Mathematics, Applied Mathematics and Mechanics, Vol. 81, Dec. 2015, pp. 52-59, doi:10.26565/2221-5646-2015-81-05.