Hohaus, Stefan, et al. “COMBINED MODALITY TREATMENT INCLUDING METHOTREXATE-BASED CHEMOTHERAPY FOR PRIMARY CEREBRAL NERVOUS SYSTEM LYMPHOMA: A SINGLE INSTITUTION EXPERIENCE”. Mediterranean Journal of Hematology and Infectious Diseases, vol. 1, no. 2, Dec. 2009, p. e2009020, doi:10.4084/mjhid.2009.020.