Bezkorovaina, L. 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): 447-63. https://umj.imath.kiev.ua/index.php/umj/article/view/1567.