S. Vashist, S. Handa, V. Puri, and N. Sakhuja, “Effect on Conductance, Viscosity and Ultrasonic Velocity Using Sodium Tetradecyl Sulphate as Surfactant with Butanol/Pentanol/Hexyl amine as Co-surfactant and Heptane/Hexane as Oil”, ajc, vol. 18, no. 2, pp. 1159–1166, Mar. 2010.