Minias, P., Kaczmarek, K., Kleszcz, A., Rakowski, M., & Janiszewski, T. (2008). Variability of clutch size in Cormorant (Phalacrocorax carbo sinensis) at the Jeziorsko Reservoir (Central Poland) in 2004. Acta Universitatis Lodziensis. Folia Biologica Et Oecologica, 4, 167–176. https://doi.org/10.18778/1730-2366.04.11