@article{RM_1974_29_2_a3,
     author = {C. Baiocchi and E. Magenes},
     title = {On free-boundary problems associated with the flow of a~liquid through porous materi},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {51--71},
     publisher = {mathdoc},
     volume = {29},
     number = {2},
     year = {1974},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1974_29_2_a3/}
}