1. Cervical preparation for second trimester dilation and evacuation;Newmann;Cochrane Database Syst Rev,2010
2. Medical methods for termination of pregnancy. Report of a WHO Scientific Group;World Health Organ Tech Rep Ser,1997
3. Surgical versus medical methods for second trimester induced abortion;Lohr;Cochrane Database Syst Rev,2008
4. Late midtrimester pregnancy termination in the presence of placenta previa;Halperin;J Reprod Med,2003
5. Termination of multiple pregnancy at 18–24 weeks' gestation by laminaria dilatation and evacuation;Halperin;J Reprod Med,2004