Anh Tuan Le, Ken Hiramatsu, and Tatsuro Nishiyama. “HYDRAULIC COMPARISON BETWEEN PIANO KEY WEIR AND RECTANGULAR LABYRINTH WEIR”. GEOMATE Journal, vol. 20, no. 82, June 2021, pp. 153-60, https://geomatejournal.com/geomate/article/view/171.