Mohamad Zain, Shaharir, and Zahrin Affandi Mohd Zahrin. “Sistem Angka Perpuluhan Yang Diketahui Tertua Di Dunia: Angka Malayonesia: The World Oldest Known Decimal Numeral System: The Malayonesian Numerals”. Journal of Science and Mathematics Letters, vol. 7, July 2019, pp. 52-65, https://doi.org/10.37134/jsml.vol7.6.2019.