A. Ragab, Yousif, AND 		B. Butler, George.
" Electron Donor Acceptor Complexes and Copolymerization Behavior of Oxazole and Thiazole with Maleic Anhydride. A Comparison with Other Five-Membered Heterocyclic Donors" <em>Gezira Journal of Engineering and Applied Sciences</em> [Online], Volume 9 Number 1 (1 June 2014)