TY - JOUR A1 - Hyndman, R.J. A1 - Booth, H. A1 - Yasmeen, F.Y. T1 - Coherent mortality forecasting: The product-ratio method with functional time series models Y1 - 2013 DO - 10.1007/s13524-012-0145-5 VL - 50 IS - 1 ER -