@article{GDZPPN001176242, title = {Numerical Solution of Steady-State Porous Flow Free Boundary Problems.}, journal = {Numerische Mathematik}, volume = {35}, year = {1980}, pages = {73-98}, zbl = {0447.76074}, url = {http://dml.mathdoc.fr/item/GDZPPN001176242} }
Alt, H.W. Numerical Solution of Steady-State Porous Flow Free Boundary Problems.. Numerische Mathematik, Tome 35 (1980) pp. 73-98. http://gdmltest.u-ga.fr/item/GDZPPN001176242/