@article{Ginanjar_Utomo_2016, title={Sim Card Alarm for Android Smartphone}, volume={7}, url={https://ejournals.umn.ac.id/index.php/SI/article/view/507}, DOI={https://doi.org/10.31937/si.v7i1.507}, number={1}, journal={Ultima InfoSys : Jurnal Ilmu Sistem Informasi}, author={Ginanjar, Rikip and Utomo, Ridho}, year={2016}, month={Jun.}, pages={9-15}