Spyros Makridakis and Michele Hibon. Accuracy of Forecasting: An Empirical Investigation. Journal of the Royal Statistical Society 142. Часть 2 (1979). С. 97–145. См. также Robin M. Hogarth and Spyros Makridakis, Forecasting and Planning: An Evaluation. Management Science 27 (февраль 1981). С. 115–138.