BUSOV, Victor B. - RINK, George - WOESTE, Keith. Allozyme variation and mating system of black walnut (Juglans nigra L.) in the central hardwood region of the United States. In Forest genetics : international journal of forest genetics. - Arbora Publishers : Zvolen. ISSN 1335-048X, 2002, vol. 9, no. 4, s. 315-322.