@article{{RM}{}, author = {Oliveira, V., Carrasco, C.}, title = { HIERARCHY OF HOMOGENEOUS LANDSCAPES UNITIES: the example of uruburetama massif, brazilian semi-arid region (ceará - brazil)}, journal = {Mercator}, volume = {2}, number = {3}, year = {2008}, doi = {10.4215/rm.v2i3.170}, url = {http://www.mercator.ufc.br/mercator/article/view/170} }