Hatice Rana Erdem, Burcu Duyur Çakıt, Esin Çetinkaya, Aynur Karagöz, and Meryem Saraçoğlu. 2007. “Evaluation of Pain Pressure Threshold and Frequency of Fibromyalgia in Patients With Dysmenorrhea”. Archives of Rheumatology 22 (1):011-014. http://anadolupsikiyatri.net/index.php/pub/article/view/212.