1. G. B. Dubois and F. W. Ocvirk, Analytical derivation and experimental evaluation of short bearing approximation for full journal bearings, NACA Rept. No. 1953, p. 1157.
2. Zur hydrodynamischen Theorie der Schmiermittelreibung;Sommerfeld;Z. Mat. Physik,1904
3. The Principles of Lubrication;Cameron,1966
4. Mechanism of lubrication in porous metal bearings;Morgan,1957