5Wu I P, Gitlin H M. Drip irrigation design based on uniformity[J]. Trans ASAE, 1974,17 (3): 429- 432.
6Wu I P. Energy gradient line approach for direct hydraulic calculation in drip irrigation design[J]. Irrig Sci, 1992,13: 21-29.
7Tal S, Zur B. Flow regime in helical long-path emitters [J]. J Irrig Drain Div,1980,106(1):27-35.
8Bralts V F, Segerlind L J. Finite element analysis of drip irrigation submain units[J]. Trans of the ASAE, 1985, 28(3):809-814.
9Haghighi K, Bralts V F, Segerlind L J. Finite element formulation of tee and bend components in hydraulic pipe network analysis[J]. Trans of the ASAE, 1988,31(6): 1750-1758.
10Bralts V F, Kelly S F, Shayya W H, et al. Finite element analysis of microirrigation hydraulics using a virtual emitter system[J]. Trans of the ASAE, 1993,36(3):717-725.
