Kravchenko, Anatoly, and José Sales Mariano da Rocha. 2007. “MEASUREMENTS OF HORIZONTAL DISTANCES USING AERIAL PHOTOGRAPHS CORRECTED BY RADIAL TRIANGULATION AND AEROSKETCHMASTER”. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics] 8 (1): 68-92. https://doi.org/10.5216/pat.v8i1.2302.