Popa, V.-M., D. N. Raba, C. Moldovan, D. G. Dumbrava, and D. Moirădean. “Technical - Economic Evaluations Experimental Casuistry Studied at Core Walnut Oil”. Review on Agriculture and Rural Development, vol. 2, no. 1, Jan. 2013, pp. 402-6, https://iskolakultura.hu/index.php/rard/article/view/13344.