Heavenly caves : reflections of the garden grottoLiving underground : a history of cave and cliff dwellingLife and art in the ice age : wanderings through the caves of southern France and SpainLa caverne peinte de LascauxA la découverte des fresques du TassiliThe megalith builders of Western EuropeSakli Kilise : kapadokyada yeni bulunmuş bir kilise : [une eglise rupestre en cappadoce].Felsengärten, Gartengrotten, Kunstberge : Motive der Natur in Architektur und GartenArtificial rock and cave works in Dutch and Belgian landscape parks; some notes