Jögi Annika, Vaapil Marica, Johansson Martin, and Påhlman Sven. “Cancer Cell Differentiation Heterogeneity and Aggressive Behavior in Solid Tumors”. Upsala Journal of Medical Sciences 117, no. 2 (February 29, 2012). Accessed January 30, 2023. https://ujms.net/index.php/ujms/article/view/6028.