• A few remarks concerning the flow of fluid under a sluice gate 

    Lenau, Charles (University of Missouri--Columbia, 1965)
    "The two-dimensional, irrotatational flow of incompressible fluid under a sluice gate in a gravitational field has been treated by de Boor (Ref. 1) using the integral equation method of Birkhoff and Zarantonello (Ref. 2). ...