Yu, Xiuzhu; Van De Voort, Frederick R.; Li, Zhixi; Yue, Tianli (2007). "Proximate Composition of the Apple Seed and Characterization of Its Oil". International Journal of Food Engineering. 3 (5). doi:10.2202/1556-3758.1283. ISSN1556-3758.
Yu, Xiuzhu; Van De Voort, Frederick R.; Li, Zhixi; Yue, Tianli (2007). "Proximate Composition of the Apple Seed and Characterization of Its Oil". International Journal of Food Engineering. 3 (5). doi:10.2202/1556-3758.1283. ISSN1556-3758.