A.U. Kinafa, S.I. Kamara, A. . Bello, M. A. Aliyu, M.S Tabra, and A. Adamu, “SEASONAL AUTOREGRESSIVE INTEGRATED MOVING AVERAGE (SARIMA) OF NIGERIAN GROSS DOMESTIC PRODUCT”, BIMA, vol. 2, no. 02, pp. 202-215, Jun. 2018.