Abba, H., H. Musa, A. Kogo, and A. Salisu. “Studies on the Effects of Ammonium Phosphates on the Flammability Properties of Poly(Vinyl Alcohol) Films”. Nigerian Journal of Basic and Applied Sciences, vol. 20, no. 2, Sept. 2012, pp. 173-6, doi:10.4314/njbas.v20i2.