Short Retraction Notice
This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. The aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused.
 T. T. Khidr, E. M. S. Azzam, S. Mutwaa and A. M. A. Omar, “Study of Some Anionic Surfactants as Pour Point Depressant Additives for Wax Gas Oil,” Industrial Lubrication and Tribology, Vol. 59, No. 2, 2007. pp. 64-68. http://dx.doi.org/10.1108/00368790710731855
 A. M. A. Omar, “Micellization and Adsorption of Anionic/Nonionic Polymer Surfactants for Metal Working Fluid at Different Interfaces,” Industrial Lubrication and Tribology, Vol. 56, No. 3, 2004, pp. 171-176. http://dx.doi.org/10.1108/00368790410532200
 M. Y. El Kady, A. K. El Morsi, N. Tantawi, A. Z. El Tabei and A. M. A. Omar, “A New Trend for Preparing Polymeric Calcium Sulphonates for Metal q Working Fluids,” Journal of Annals of University, Dunarea De Jos of Galati, Tribology, Fascice, Romania, Vol. 11, 2006.