Vitanov, Kaloyan, and Maroussia Slavtchova-Bojkova. 2017. “MULTITYPE BRANCHING PROCESSES IN CONTINUOUS TIME AS MODELS OF CANCER”. Ann. Sofia Univ. Fac. Math. And Inf. 104 (December):193-200. https://ftl5.uni-sofia.bg./index.php/fmi/article/view/45.