Prabowo, Agung, et al. “Determination of Agricultural Insurance Premium Prices Based on Rainfall Index With the Black-Scholes Model”. PESHUM : Jurnal Pendidikan, Sosial Dan Humaniora, vol. 2, no. 5, Aug. 2023, pp. 895-03, doi:10.56799/peshum.v2i5.1899.