Khan, A Rasheed, Z H Farooqui, Shabih-ul- Hasan, and Asif Imran. 2000. “?PREPARATION OF HYDROGELS BASED ON PYA-ACRYLIC ACID USING N,N-METHYLENEBISACRYLAMIDE As CROSSLINKING AGENT”. Biological Sciences - PJSIR 43 (1):60-64. http://v2.pjsir.org/index.php/biological-sciences/article/view/1995.