ARSY, F. A. Demand Forecasting of Toyota Avanza Cars in Indonesia: Grey Systems Approach. International Journal of Grey Systems, [S. l.], v. 1, n. 1, p. 38–47, 2021. DOI: 10.52812/ijgs.24. Disponível em: https://publish.thescienceinsight.com/index.php/ijgs/article/view/24. Acesso em: 10 mar. 2025.