References
- Henderson , F. M. 1966 . Open channel flow , New York : The Macmillan Company .
- Keulegan , G. H. . Determination of critical depth in spatially variaple flow . Proc. Second Midwestern Conference . Vol. 895 , pp. 67 – 80 . Per 24
- Beij , K. H. 1934 . Flow in roof gutters . U.S. Dept. of Commerce, Bureau of Standards Journal of Research , 12 ( 2 ) : 193 – 213 .