Umar, R., and Ihyak Ulumuddin. “Using of Exact Queries and Expansion Queries in Searching for Indonesian Translated Al-Quran Verses”. Jurnal Mantik, vol. 4, no. 3, Nov. 2020, pp. 2304-10, doi:10.35335/mantik.Vol4.2020.1133.pp2304-2310.