Ahmad Zabidi, Noriza, Ahmad Nazrul Rosli, Hasan Abu Kassim, Shrivastava K.N, Rao P.V, and Devi V.R. 2007. “Adsorption of Atoms on Thymine: Density Functional Theory”. Malaysian Journal of Science 26 (2):99-109. http://ojie.um.edu.my/index.php/MJS/article/view/8074.