Sung-Han Hsiao, Shi-Yu Luo, Ching-Ya Su, Wei-Cherng Tuo, Cheng-Ting Chiang, Yan-Qing Li, Yang-Hui Huang, & Chung-Pu Wu. (2014). The Overexpression of ABCG2 Reduces the Efficacy of Volasertib (BI 6727) and GSK641364 in Human S1-M1-80 Colon Carcinoma Cells. Journal of Cancer Research Updates, 3(2),  108–116. https://doi.org/10.6000/1929-2279.2014.03.02.5