1. 20 years' experience in chemotherapy of choriocarcinoma and malignant mole;Song;Chin Med J,1979
2. The treatment of choriocarcinoma and chorioadenoma destruens with 6MP and surgery;Sung,1962
3. A staging system of gestational trophoblastic neoplasms based on the development of the disease;Song;Chin Med J,1984
4. The incidence of hydatidiform mole based on a retrograde investigation of 202 million women in 23 provinces [in Chinese];Sung;Natl Med J China,1980