Literatur
Greuel, G.-M.; Lossen, C.; Shustin, E.: Singular algebraic curves. Ch. I.3
and I.4 of forthcoming book. Springer;
Brieskorn, E.; Knörrer, H.: Plane algebraic curves. Birkhäuser
(1986);
Mumford, D.: Lectures on curves on an algebraic surface.
Princeton Univ. Press (1966);
Artin, M.: Deformations of singularities. Tata Inst. FRLN 54 (1976);
Wahl, J.: Deformations of plane curves with nodes and cusps. Amer.
J. Math. 96, pp. 529-577 (1974).