*Castetter, E.F. & Erwin, A.T., 1927. A systematic study of squashes and pumkins. ''Iowa Agr. Exp. Sta. Bull.'', '''21'''(244) : 103-135. A chercher. Serait la première source pour les groupes. [http://lib.dr.iastate.edu/bulletin/vol21/iss244/1 en ligne]
*Defay, Bruno, 1993. ''Trésors de courges et de potirons. Jardinage et cuisine''. Paris, Terre vivante. 95 p.
* Ferriol, María ; Picó, Belén & Nuez Fernando, 2004. Morphological and Molecular Diversity of a Collection of ''Cucurbita maxima'' Landraces. ''Journal of the American Society for Horticultural Science'', '''129''' (1) : 60–69. Propose une nouvelle classification.
*Giannini T.C., Saraiva, A.M. & Alves-dos-Santos, I.A., 2009. Ecological niche modeling and geographical distribution of pollinator and plants: A case study of ''Peponapis fervens'' (Smith, 1879) (Eucerini: Apidae) and ''Cucurbita'' species (Cucurbitaceae). ''Ecological Informatics''.
*Goldman, Amy. 2004. ''The compleat squash: A passionate grower's guide to pumpkins, squashes, and gourds''. New-York, Artisan. 215 p.