Durak, Z., S. Buber, E. Devrim, H. Kocaoglu, and I. Durak. “Aquoeus Extract from Rhubarb Plant Inhibits Adenosine Deaminase Activity in Cancerous and Non Cancerous Human Gastric and Colon Tissues”. Journal of Progressive Research in Chemistry, Vol. 1, no. 1, May 2015, pp. 9-13, http://scitecresearch.com/journals/index.php/jprc/article/view/147.