Ilyenko, A.A., and V.A. Medvedev. “The Mountain Undulating Area of Dendrological Park Trostyanets: The History of Formation, the Methods of Composition”. Plant Introduction 45 (March 1, 2010): 73-79. Accessed October 20, 2026. http://www.plantintroduction.org/index.php/pi/article/view/604.