Déformations régulières
Séminaire Henri Cartan, Volume 13 (1960-1961) no. 1, Talk no. 3, 8 p. 
@article{SHC_1960-1961__13_1_A2_0,
     author = {Douady, Adrien},
     title = {D\'eformations r\'eguli\`eres},
     journal = {S\'eminaire Henri Cartan},
     publisher = {Secr\'etariat math\'ematique},
     volume = {13},
     number = {1},
     year = {1960-1961},
     note = {talk:3},
     zbl = {0156.42802},
     language = {fr},
     url = {http://www.numdam.org/item/SHC_1960-1961__13_1_A2_0}
}

Douady, Adrien. Déformations régulières. Séminaire Henri Cartan, Volume 13 (1960-1961) no. 1, Talk no. 3, 8 p. http://www.numdam.org/item/SHC_1960-1961__13_1_A2_0/

[1] Douady (Adrien). - Variétés et espaces mixtes, Séminaire Cartan, t. 13, 1960/61 : Déformations de structures analytiques complexes, n° 2, 7 p. | Numdam | Zbl 0156.42801

[2] Kodaira (K.) and Spencer (D.). - On deformation of complex analytic structures, I., Annals of Math., Series 2, t. 67, 1958, p. 328-401. | MR 112154 | Zbl 0128.16901