Tristono, T., Cahyono, S., Triono, J., Sidqon, M., Aji, S., Sudarno, S., & Junaedi, N. 2026 Jan 7. THE CONSERVATION NUMBERS IN THE PETRI NET MODEL OF THREE-PHASE TRAFFIC LIGHTS WITH THE NORWEGIAN SYSTEM. Jurnal Ilmiah Matematika dan Pendidikan Matematika. [Online] 17:2