@Article{grohmann2004,
author = {C.H. Grohmann },
title = {Morphometric analysis in geographic information systems; applications of free software GRASS and R},
journal = {Computers and Geosciences},
year = {2004},
volume = {30},
number = {9-10},
pages = {1055-1067},
month = {November}
note = {ISSN 0098-3004}
link = {http://dx.doi.org/10.1016/j.cageo.2004.08.002}
}
@Article{grohmann2005,
author = {C.H. Grohmann },
title = {Trend-surface analysis of morphometric parameters: A case study in southeastern Brazil},
journal = {Computers and Geosciences},
year = {2005},
volume = {31},
number = {8},
pages = {1007-1014},
month = {October}
note = {ISSN 0098-3004}
link = {http://dx.doi.org/10.1016/j.cageo.2005.02.011}
}