Rédei, Károly, and Borbála Antal. “Black Walnut As a Valuable Stand-Forming Tree Species in Hungary – a Growing Technology Review”. Acta Agraria Debreceniensis, no. 72 (May 16, 2017): 129–132. Accessed August 16, 2022. https://ojs.lib.unideb.hu/actaagrar/article/view/1603.