Ratyńska, H., Grodzki, M., Waldon, B. and Wachowiak, E. (2011) “Introduction of Alien Tree Species and Its Influence on Floristical Composition and Vegetation Structure of Acidophilous Oak Forests: the Experimental Plots in the Zielonka Forest”, Acta Universitatis Lodziensis. Folia Biologica et Oecologica, 7, pp. 177–190. doi: 10.2478/v10107-009-0024-z.