5Unnikrishnan R., Jain M.C., Harinarayan A.K., et al. Additive-additive interaction: an XPS study of the effect of ZDDP on the AW/EP characteristics of molybdenum based additives[J]. Wear , 2002 , 252: 240-249.
6Muraki M., Yanagi Y., Sakaguchi K., Synergistic effect on frictional characteristics under rolling-sliding conditions due to a combination of molybdenum dialkyl dithio carbamate and zinc dialkyl dithiophosphate[J]. Tribol. Int. 30 (1997) 69-75.