ShchegolevS. A. “Construction of a Solution of a Quasilinear Partial Differential Equation of Parabolic Type With Oscillating and Slowly Varying Coefficients”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 47, no. 8, Aug. 1995, pp. 1129–1135, https://umj.imath.kiev.ua/index.php/umj/article/view/5509.