Nurrochmawati, Ike, Ruben Dharmawan, and Pawito -. 2017. “Biological, Physical, Social, and Environmental Factors Associated With Dengue Hemorrhagic Fever in Nganjuk, East Java”. Journal of Epidemiology and Public Health 2 (2):93-105. https://jepublichealth.com/index.php/jepublichealth/article/view/38.