1. Tribology of rough surfaces. Stochastic models of hydro-dynamic lubrication;Christensen;SINTEF Res. Rept. No. 10/69-18,1969
2. Tribology of rough surfaces. Parametric study and comparison of lubrication models;Christensen;SINTEF Res. Rept. No. 22/69-18,1969
3. A theory of hydrodynamic lubrication of rough surfaces;Christensen,1970
4. H. Christensen and K. Tønder, The hydrodynamic lubrication of rough bearing surfaces of finite width; to be published.
5. H. Christensen, A theory of mixed lubrication; to be published.