Mangalaeng, Aswad Hariri, et al. “Riemann Integral Construction Of A Sequence Of Functions In A Normed Space (l^p,‖∙‖_p )”. Jurnal Matematika, Statistika Dan Komputasi, vol. 16, no. 3, Apr. 2020, pp. 263-72, doi:10.20956/jmsk.v16i3.8314.