M A, Idris, Ruppel A, and Petney T. “Antibodies Against Rickettsia in Humans and Potential Vector Ticks from Dhofar, Oman”. Sultan Qaboos University Medical Journal [SQUMJ] 2, no. 1 (January 1, 2000): 7–10. Accessed April 15, 2021. https://journals.squ.edu.om/index.php/squmj/article/view/1187.