Abdullahi A.A., Kazeem E.L., Abbas U.F. and Hassan M. 2023. ROBUST ORDER IDENTIFICATION OF ARIMA AND GARCH MODELS: STATIONARY AND NON-STATIONARY PROCESS. FUDMA JOURNAL OF SCIENCES. 7, 3 (Jul. 2023), 10 - 15. DOI:https://doi.org/10.33003/fjs-2023-0703-1847.