Chandra, Novita, Supriyanto Supriyanto, and Renny Renny. 2015. “SISTEM ANTRIAN MODELGEO/G/1 DENGAN VACATION”. UJMC (Unisda Journal of Mathematics and Computer Science) 1 (01), 47 - 54. https://doi.org/https://doi.org/10.52166/ujmc.v1i01.436.