Zero-divisor type graphs and nonzero-divisor type graphs for some rings of integers and theirs topological indices / by Nurul 'Ain Mazlan, 1997-, author 653165, Hazzirah Izzati Mat Hassim, 1990-, supervisor 567518, Nor Haniza Sarmin, supervisor 615523, Sanhan Muhammad Salih Khasraw, supervisor 653166, Fakulti Sains 8004