I. O. Emmanuel i K. B. Ahmed, „Weed Infestation and Productivity of Maize/Soybean Inter crop As Influenced by Cropping Pattern in the Southern Guinea Savanna of Nigeria“, J. Agric. Sci. (Bg.), vol 63, izd. 1, Mart 2018, Pristupljeno: 12. Juli 2026. [Online]. Dostupno na: https://asistent.ceon.rs/index.php/jas/article/view/15656