1. Observations relating to the wettability of porous rock;Amott;Trans. AIME,1959
2. Wettability literature survey: Part 1. Rock/oil/brine interactions and the effects of core handling on wettability;Anderson;JPT,1986
3. Standard Test Method for Acid Number of Petroleum Products by Potentiometric Titration;ASTM D664,1989
4. Standard Test Method for Characteristic Groups in Rubber Extender and Processing Oils by the Clay–Gel Adsorption Chromatographic Method;ASTM D2007,1980
5. Standard Test Method for Base Number of Petroleum Products by Potentiometric Perchloric Acid Titration;ASTM D2896,1998