BoichukО. A., ChuikoE. V., and ChuikoS. M. “Generalized Green Operator of a Boundary-Value Problem With Degenerate Pulse Influence”. Ukrains’kyi Matematychnyi Zhurnal 48, no. 5 (May 25, 1996): 588-594. Accessed July 27, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/5291.