Ali Khan1, F.; Abbas2, S.; Ahmad3, B.; M. Abdei-Salam4, N.; Ullah5, R. Study of Cross-Linked Poly(N-Vinyl-2-Pyrrolidone) Gel and Its Uses in the Controlled Release of Antiinflammatory Drug Diclofenac Sodium. ajc 2014, 26, 7061-7066.