AbdEl-Rahman, Noha G., et al. “Use of Aquagel-Polymer As a Soil Conditioner for Celery Plants Grown in Sand Culture”. Future of Food: Journal on Food, Agriculture and Society, vol. 6, no. 1, Dec. 2018, pp. 85-94, https://thefutureoffoodjournal.com/manuscript/index.php/FOFJ/article/view/13.