1. Multiple primary malignant tumors, survey of the literature and a statistical study;Warren;Am J Cancer,1932
2. Some characteristics of multiple primary cancers;Mersheimer;Ann NY Acad Sci,1964
3. A statistical study on cancer-from the viewpoint of time and age;Mori;Tr Soc Path Jap,1957
4. On multiple primary cancers;Akazaki;Jap J Clin Med,1961