1. Abramowitz M, Stegun IA (1972) Handbook of mathematical functions with formulas, graphs, and mathemtical tabels, 10th edn. Department of Commerce, National Buereau of Standards, Applied Mathematics Series No. 55, USA
2. Bresse J (1860) Cours de mécanique appliqué. hydraulique, 2e partie edn. Mallet-Bachelier, Paris
3. Chen CL, Wang CT (1969) Nondimensional gradually varied flow profiles. J Hydraulics Div, ASCE 95(HY5):1671–1686
4. Chen CL (1991) Unified theory on power laws for flow resistance. J Hydraulic Eng, ASCE 117(3):371–389
5. Chow VT (1957) Closure of discussions on integrating the equation of gradually varied flow. J Hydraulics Div, ASCE 83(1):9–22