GoncharenkoS. V., and PoryadennayaV. I. 1971. “On Approximate Plotting of the Function Mapping a Circular Triply Connected Domain onto a Circle With Cuts ”. Ukrains’kyi Matematychnyi Zhurnal 23 (3), 372-77. https://umj.imath.kiev.ua/index.php/umj/article/view/8565.