1. Carr, M., Kay, M.G., 1981. bubbler irrigation. Hortic. Ind. (March), 11–12.
2. Christiansen, J.E., 1942. Irrigation by sprinkling. California Agriculture Experiment Station Bulletin 670, Davis, CA.
3. Didan, K., Reynolds, C.A., Yitayew, M., 1996. bubbler: user’s manual. A computer program for designing low-head, gravity-flow irrigation for trees, vines, and orchard crops. Agricultural Experiment Station Bulletin, University of Arizona.
4. Hermsmeier, L.F., Willardson, L.S., 1970. Friction factors for corrugated plastic tubing. J. Irrig. Drain. Eng., ASCE. September, 96 (IR3), 265–271.
5. A low pressure irrigation system for orchard tree and plantation crops;Hull;Agric. Eng.,1981