iwueze, iheanyi sylvester. “BEST LINEAR UNBIASED ESTIMATE USING BUYS-BALLOT PROCEDURE WHEN TREND-CYCLE COMPONENT IS LINEAR”. Pakistan Journal of Statistics and Operation Research 7, no. 2 (April 27, 2011): 199-216. Accessed October 2, 2025. https://pjsor.com/pjsor/article/view/183.