HaghNazari, Farzad, Karandish, Fatemeh, Darzi-Naftchali, Abdullah, Simunek, Jirka. “Influence of different subsurface drainage systems on nitrate losses from rainfed-canola  croplands.” Journal of Water and Soil Resources Conservation, vol. 9, no. 4, 2020, pp. 121-134.