Marola, G., N. Satyahadewi, and W. Andani. “APPLICATION OF THE BLACK SCHOLES METHOD FOR COUNTING AGRICULTURAL INSURANCE PREMIUM PRICE BASED ON RAINFALL INDEX IN KAPUAS HULU REGENCY”. BAREKENG: Jurnal Ilmu Matematika Dan Terapan, Vol. 17, no. 2, June 2023, pp. 0819-26, doi:10.30598/barekengvol17iss2pp0819-0826.