Pilinszky, Katalin, Andras Bittsanszky, Gabor Gyulai, and Tamas Komives. “Effects of Ammonium Salts on Oleaster (Elaeagnus Angustifolia)”. Ecocycles 1, no. 1 (August 26, 2015): 28-32. Accessed September 27, 2020. https://www.ecocycles.net/ojs/index.php/ecocycles/article/view/21.