Global upscaling of permeability in heterogeneous reservoirs; The output least squares (OLS) method Publication details Journal: Transport in Porous Media, vol. 40, p. 115–143, 2000 International Standard Numbers: Printed: 0169-3913 Electronic: 1573-1634 You are here: Home Publications Scientific article Global upscaling of permeability in heterogeneous reservoirs; The output least squares (OLS) method