Udrişte, Constantin, Adrian Constantinescu, and Steluta Pricopie. “TOPOLOGY AND DIFFERENTIAL STRUCTURE ON DESCARTES FOLIUM”. Ann. Sofia Univ. Fac. Math. and Inf. 103 (December 12, 2016): 61–69. Accessed November 21, 2024. https://ftl5.uni-sofia.bg/index.php/fmi/article/view/54.