1. Contraceptive implants;Raymond,2008
2. World Health Organization Department of Reproductive Health and Research (WHO/RHR) and Johns Hopkins Bloomberg School of Public Health/Center for Communication Programs (CCP), INFO Project. Family planning: a global handbook for providers. Baltimore and Geneva: CCP and WHO; 2008.
3. Implants: the next generation;Ramchandran,2007
4. Introducing the contraceptive implant in Thailand: impact on method use and costs;Janowitz;Internat Fam Plann Perspec,1994