WANG SUH-MIINChng Lee MueiToh Pek Lan2024-10-232024-10-232020https://doi.org/10.26634/jms.8.2.16456https://dspace-cris.utar.edu.my/handle/123456789/4327FT-IR AND ELECTRONIC PROPERTIES INVESTIGATIONS ON THEOPHYLLINE MOLECULAR SYSTEM: DENSITY FUNCTIONAL THEORY CALCULATIONjournal-article