A 3D porous media liver lobule model: the importance of vascular septa and anisotropic permeability for homogeneous perfusion. - Debbaut, Charlotte; Vierendeels, Jan; Siggers, Jennifer H.; Repetto, Rodolfo; Monbaliu, Diethard; Segers, Patrick (Computer Methods in Biomechanics & Biomedical Engineering, 2014)