SamoilenkoV. G. and SamoilenkoY. I. (2018) “Asymptotic $Σ$-solutions to singularly perturbed Benjamin – Bona – Mahony equation with variable coefficients”, Ukrains’kyi Matematychnyi Zhurnal, 70(2), pp. 236-254. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/1554 (Accessed: 20September2024).