Hsu, K. , Huang, H. , Tung, C. , Chen, Y. , Ho, S.. "Analysis of Physicochemical Properties on Prediction of R5, X4 and R5X4 HIV-1 Coreceptor Usage". World Academy of Science, Engineering and Technology, Open Science Index 29, International Journal of Biomedical and Biological Engineering (2009), 3(5), 262 - 269.