BezkorovainaL. L. (2018) “Surfaces generated by the real and imaginary parts of analytic functions: $A$-deformations occurring independently or simultaneously”, Ukrains’kyi Matematychnyi Zhurnal, 70(4), pp. 447-463. Available at: http://umj.imath.kiev.ua/index.php/umj/article/view/1567 (Accessed: 29November2020).