1. Bauer S. W. and Graf W. H. (1971). “Free overfall as flow measuring device.” Proc. ASCE 97(1).
2. Delleur J. W. Dooge J. C. and Gent K. W. (1956). “Influence of slope and roughness on the overfall.” Proc. ASCE 82(4).
3. Diskin M. H. (1961). “End depth at a drop in trapezoidal channels.” Proc. ASCE 87(4).
4. Diskin M. H. (1964). “Discussion of “End depth for circular channels ” by N. Rajaratnam and D. Muralidhar.” Proc. ASCE 90(6).
5. Ferreri G. B. and Ferro V. (1989). “Esame sperimentale del comportamento idraulico di una sistemazione a salti di fondo: primi risultati.” Idrotecnica 3 (in Italian).