Khan, M. S., A. Rehman, and N. M. Khan. “?THERMODYNAMIC AND VISCOMETRIC STUDIES OF POLYBUTADIENE RUBBER IN TOLUENE AT VARIOUS TEMPERATURES”. Biological Sciences - PJSIR, vol. 42, no. 3, June 1999, pp. 117-20, http://v2.pjsir.org/index.php/biological-sciences/article/view/2128.