1. R. R. Abduraupov, Copyright certificate. 1476059 (USSR). Irrigation device / SANIIRI named after V.D. Zhurin; Applied. 09/25/87, No. 4321758 / 30-15; Publ. in BI, No. 16. (1989)
2. A. D. Altshul, Hydraulic resistance, (Moscow, Nedra, 1982)
3. A. Bateman, M. Gomez and J. Dolz, (9-13 September 1991), “Factor Estimation from Laboratory and Field” in XXIV IAHR Congress Madrid Models and Control Systems for Hydraulic Engineering, (Madrid, 1991), pp. 331–340
4. A. A. Bishop, Crops and Soils Magazine, 33(2), 13–16 (1980)
5. A. A. Bishop, Utah Science 41(2), 60–64 (1980)