Horodets’kyiV. V., & MartynyukO. V. (2014). Nonlocal Problem Multipoint in Time for the Evolutionary Equations with Pseudo-Bessel Operators with Variable Symbols. Ukrains’kyi Matematychnyi Zhurnal, 66(2), 159–175. Retrieved from http://umj.imath.kiev.ua/index.php/umj/article/view/2120