F. I. Achuba and M. O. Ja-anni, “Effect of abattoir waste water on metabolic and antioxidant profilesof cowpea seedlings grown in crude oil contaminated soil”, Int. J. Recycl. Org. Waste Agric., vol. 7, no. 1, Jan. 2018, doi: 10.1007/s40093-017-0190-6.