1. Atiyah M F, On analytic surfaces with double points, Proc. Roy. Soc. London. Ser. A 247 (1958) 237–244
2. Barlet D and Magnússon Jón, Cycles Analytiques Complexes II: L’espace des Cycles, Cours Specialises, vol. 27 (2020) (Société Mathématique de France)
3. Goresky M and MacPherson R, Stratified Morse theory, Ergebnisse der Mathematik und ihrer Grenzgebiete (3), vol. 14 (1988) (Berlin: Springer)
4. Griffiths P and Harris J, Principles of algebraic geometry, Wiley-Interscience (1978) (New York: Wiley), Pure and Applied Mathematics, MR MR507725 (80b:14001)
5. Lecture Notes in Mathematics;R Hartshorne,1970