Muchtar, K., J. Titaley, and M. Mananohas. “Integral Baire-1 Stieltjes, Henstock-Stieltjes Dan Riemann-Stieltjes”. d\’Cartesian: Jurnal Matematika Dan Aplikasi, vol. 5, no. 1, Apr. 2016, pp. 7-12, doi:10.35799/dc.5.1.2016.11937.