Zavizion, G. V. (1999) “Asymptotic integration of systems of integro-differential equations with degeneracies”, Ukrains’kyi Matematychnyi Zhurnal, 51(2), pp. 170–180. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4596 (Accessed: 15May2024).