N. Tóth, P. Gyüre, J. Posta, and L. Juhász, “Population date of Great Cormorant at the area of the Hortobágy Fish Farm Co”., Acta agrar. Debr., no. 51, pp. 51–54, Feb. 2013, doi: 10.34101/actaagrar/51/2061.