Several books / guides, including:
Speleo dans le Vercors 1 & 2, original Speleo Sportive dans le Vercors, Speleo dans les Alpes de Haute Savoie, Vercors Caves, Northern Caves (original) Ingleborough, and Leck & Casterton, Caves of Derbyshire (original), Caves of South Wales, Mendip Underground...