1. A method for the study of wear particles in lubricating oil;Seifert;Wear,1972
2. Comparison of filtergram technique with analytical ferrography;Kuhnell,1986
3. E.R. Bowen and V.C. Westcott, Wear Particle Atlas, Foxboro Analytical, Burlington, Vol. 1.
4. A Random Walk Through Fractal Dimensions;Kaye,1989
5. The applications of fractals to the morphological description of particles generated in tribological systems;Kirk;Trans. I.E. Aust., Mech. ME,1991