Petits et gros topos en géométrie algébrique Michel Coste, Gérard Michon (1981) Cahiers de Topologie et Géométrie Différentielle Catégoriques
Product preserving bundle functors on fibered manifolds Włodzimierz M. Mikulski (1996) Archivum Mathematicum The complete description of all product preserving bundle functors on fibered manifolds in terms of natural transformations between product preserving bundle functors on manifolds is given.