Johnston, Thomas P.; McCaleb, George S.; Montgomery, John A. (1963). “The Synthesis of Antineoplastic Agents. XXXII. N-Nitrosoureas.1I.”. Journal of Medicinal Chemistry6 (6): 669–681. doi:10.1021/jm00342a010. ISSN0022-2623.
Johnston, Thomas P.; McCaleb, George S.; Montgomery, John A. (1963). “The Synthesis of Antineoplastic Agents. XXXII. N-Nitrosoureas.1I.”. Journal of Medicinal Chemistry6 (6): 669–681. doi:10.1021/jm00342a010. ISSN0022-2623.