[1]
Weber, E.J. and Fontana, D.C. 2012. Horizon obstruction computed from a digital elevation model. Pesquisa Agropecuaria Brasileira. 47, 9 (Nov. 2012), 1327–1336. DOI:https://doi.org/10.1590/S1678-3921.pab2012.v47.11131.