The book "Law of Associations" has been written by 40 authors, each one specialized on the topic. Chapter 2 "Legal Status of an Artificial Person" (incorporation) tackles the very complex question of non declared associations. It also deals with declared associations. The right capacity to act in justice, which is a very difficult subject, is particularly developped.
DELGA, J. (2000). La personnalité morale de l'association. Chapitre II. In: Droit des associations. 1st ed. Dalloz, pp. 150-342.