1. Optimum backwashing of sand filters;Amirtharajah,1978
2. Optimum backwashing of filters with air scour: a review;Amirtharajah;Wat. Sci. Technol.,1993
3. Optimum backwash of dual media filters and GAC filter-adsorbers with air scour;Amirtharajah,1991
4. Standard for the Specification, Approval and Testing of Granular Filtering Materials;BEWA,1993
5. Backwash of granular filters;Cleasby,1975