1. Seawater intrusion in layered aquifers;Collins;Water Resour. Res.,1971
2. Comments on ‘The shape of the interface in steady flow in a stratified aquifer’ by Y. Mualem and J. Bear;Collins;Water Resour. Res.,1977
3. Mualem , Y. The form of the interface in steady flow in a stratified porous medium (in Hebrew Haifa, Israel 1970
4. Interface refraction at the boundary between two porous media;Mualem;Water Resour. Res.,1973