1. Q-tip test in stress urinary incontinence.;Crystle;Obstet Gynecol,1971
2. Use of lubricant in female urethral catheterization.;Woodward;Br J Nurs,2005
3. Ostergard’s urogynecology and pelvic floor dysfunction.;Swift,2003
4. Williams gynecology.;Wai,2008
5. Comprehensive gynecology.;Lentz,2007