Lewis, S.R.; Lewis, R.; Richards, P.; Buckley-Johnstone, L.E. (2014). "Investigation of the isolation and frictional properties of hydrophobic products on the rail head, when used to combat low adhesion". Wear. 314 (1–2): 213–219. doi:10.1016/j.wear.2013.11.024. ISSN0043-1648.
Lewis, S.R.; Lewis, R.; Richards, P.; Buckley-Johnstone, L.E. (2014). "Investigation of the isolation and frictional properties of hydrophobic products on the rail head, when used to combat low adhesion". Wear. 314 (1–2): 213–219. doi:10.1016/j.wear.2013.11.024. ISSN0043-1648.