Parapak, Intan, Oka Ratnayani, Manuntun Manurung, & James Sibarani.
" GRAFTING COPOLYMERIZATION OF OZONATED POLYPROPYLENE WITH POLY(ACRYLIC ACID) : AS CATIONIC EXCHANGER." <em>CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry)</em> [Online], 12.2 (2024): 64 - 72. Web.  5 Feb. 2025