N. Slaiman, Ezzat, Haidar M. Al-Qamaje, and Shahad Z. Atta. 2011. “Composition and Temperature Dependence of Excess Volume of Heavy Oil-Stocks Mixtures + (Gas Oil or Toluene or Reformate)”. Al-Khwarizmi Engineering Journal 7 (3): 59-67. https://www.alkej.uobaghdad.edu.iq/index.php/alkej/article/view/73.