(1)
Rodolfi, G.; Vigiak, O.; Ongaro, L. An Application of De Ploey’s Es Model for a Quick Appraisal of the Gully Erosion Activity in a Small Watershed in the Eritrean Highlands (Halhale, Debarwa). Geog. Fis. Dinam. Quat. 1998, 21 (2), 255-266.