9R. Lewis,R.S. Dwyer- Joyce,Wear at the wheel- rail interfacewhen sanding is used to increase adhesion, Journal ofRail and Rapid Transit 2006,220:29-41.
10O. Arias- Cuevas,Z. Li,R. Lewis,E.A. Gallardo- Hernandez,Rolling- sliding laboratorytests of friction modifiers in leaf contaminatedwheel-rail contacts,in:2008 International Joint TribologyConference,October 20-22,Miami,Florida,USA,2008.
