kamal, M. shahzad, Mamoor, G.M., Qamar, N., Farooq, M. and Sarfraz, muhammad 2011. Free radical graft modification of polyethylene with methacrylic acid and styrene monomer. Chemical Engineering Research Bulletin. 15, 1 (Aug. 2011), 34–38. DOI:https://doi.org/10.3329/cerb.v15i1.7419.