Martoni, Ida Farida, and Heru Santoso. “DESIGN AND CONSTRUCTION OF WATER FILTER MODEL WITH ZEFAR MEDIA AND BACKWASH METHOD FOR MEDIA CLEANING”.
CENTRAL ASIA AND THE CAUCASUS 23, no. 1 (January 30, 2022): 895–909. Accessed June 27, 2025.
https://ca-c.org/index.php/cac/article/view/123.