Skuratovskii, R. V. “Ideals of One-Branch Singularities of Curves of the Type $W$”. Ukrains’kyi Matematychnyi Zhurnal 61, no. 9 (September 25, 2009): 1257–1266. Accessed April 27, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/3097.