Bondarenko, V.G. (2003) “Construction of a Fundamental Solution of a Perturbed Parabolic Equation”, Ukrains’kyi Matematychnyi Zhurnal, 55(8), pp. 1011–1021. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3977 (Accessed: 14 April 2025).