1. Treatment of Cancer. 6th Edn;Price P,2014
2. Chronic lymphocytic leukemia;Perry MC,2012
3. Lymphoma Coalition Europe. (2022). https.//lymphomacoalition.org/europe/.
4. Leukemia - chronic lymphocytic - CLL. statistics. (2022). https://www.cancer.net/cancer-types/leukemia-chronic-lymphocytic-cll/statistics.
5. Manual of Clinical Oncology;Territo MC,2017