Bianchetto, Elisa, Angelo Vitone, Claudio Bidini, and Francesco Pelleri. 2013. “Effects of Different Intercropping on Walnut Growth and Stem Quality in a Plantation Close to Pesaro (Marche Region)”. Annals of Silvicultural Research 37 (1):38-44. https://doi.org/10.12899/asr-776.