1. BEATSON, G. T., LANCET 148: 104 (1896).
2. BEATSON, G. T., LANCET 148: 162 (1896).
3. DAVIS, R.K., TUMOR INCIDENCE IN NORMAL SPRAGUE-DAWLEY FEMALE RATS, CANCER RESEARCH 16: 194 (1956).
4. ENGELBRETHHOLM, J, Acceleration of the development of mammary carcinomas in mice by methylcholanthrene, CANCER RESEARCH 1: 109 (1941).
5. HADDOW, A, PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES 241: 147 (1948).