1. Hydraulic Design of Labyrinth Weirs
2. Leite Ribeiro, M., Bieri, M., Boillat, J-L., Schleiss, A., Delorme, F. and Laugier, F. (2009). "Hydraulic capacity improvement of existing spillways - Design of piano key weirs". 23rd Congress of Large Dams. Question 90, Response 43. 25-29 May 2009. Brasilia, Brazil.