1. Darcy's Law and the Field Equations of the Flow of Underground Fluids
2. L. J. Klinkenberg, 1942 . The permeability of porous media to liquids and gases . API Drilling and Production Practices, p.200 .
3. M. Muskat, 1946 . The flow of homogeneous fluids through porous media . J. W. Edwards, Inc., Ann Arbor, Michigan, p.763 .