1. J. Lipman, Introduction to resolution of singularities, Proceedings of Symposia in Pure Mathematics, Vol. XXIX, Algebraic Geometry Arcata (A.M.S. 1975) pp. 187–230.
2. H. Hironaka, Characteristic polyhedra of singularities, Journal of Maths. Kyoto University, Vol. 7, No. 3 (1968).
3. A treatise of the method of fluxions and infinite series, with its application to the geometry of curve lines by the inventor Sir Isaac Newton (London 1671), Johnson Reprint Corporation.
4. R. Thom, Sur la théorie des enveloppes, Journal de Maths. Pures et Appliquées, Tome XLI, Fase. 2 (1962).
5. O. Zariski, Some open questions in the theory of singularities, Bull. A.M.S. t. 77, No. 4 (July 1971) pp. 481–491.