Excerpt from The Quarterly Journal of Pure and Applied Mathematics, 1908, Vol. 39
1. In former communication I expressed the opinion that the conic node and the binode are the only simple point singularities that an algebraic surface can possess; Это и многое другое вы найдете в книге The Quarterly Journal of Pure and Applied Mathematics, 1908, Vol. 39 (Classic Reprint) (James Joseph Sylvester)