1. Artificial abortion at mid pregnancy by mechanical stimulation of the uterus;Manabe;Am J Obstet Gynaecol,1969
2. Five hundred consecutive saline abortions;Kerenyi;Am 3 Obstet Gynecol,1973
3. Intra-amniotic urea as a mid trimester abortifacient: Clinical results and serum and urinary changes;Burnett;Am J Obstet Gynaecol,1975
4. Mid-trimester abortion by hypertonic saline instillation-experience at Ramathibodi Hospital;Suthutvoravut;J Med Assoc Thai,1983
5. Abortifacient efficacy of intravaginal prostaglandin F2a;Wentz;Am J Obstet Gynecol,1973