Destain, MF., Descornet, G., Roisin, C., & Frankinet, M. (1989). Investigation of Soil Degradation By Means of An Opto-electronic Microreliefmeter. Soil & Tillage Research, 13(3), 299-315. https://hdl.handle.net/2078.5/68337 (Original work published 1989)