M A, I., R. A, and P. T. “Antibodies Against Rickettsia in Humans and Potential Vector Ticks from Dhofar, Oman”. Sultan Qaboos University Medical Journal [SQUMJ], vol. 2, no. 1, Jan. 2000, pp. 7-10, https://journals.squ.edu.om/index.php/squmj/article/view/1187.