Y. Lageat et al., The retreat of the chalk cliffs of the Pays de Caux (France): erosion processes and patterns, Zeitschrift fur Geomorphologie. Supplementband Zeitschrift fur Geomorphologie. Supplement;Zeitschrift fur Geomorphologie. Supplementary issue Annals of geomorphology. Supplement;Annales de geomorphologie. Supplement, 144, 2006, pp. 183-197