References

DeBoor, Carl (1981), A Practical Guide to Splines, New York: Springer-Verlag.

Hodrick, R. J., and Prescott, E. C. (1980). "Post-war U.S. business cycles: An empirical investigation." Discussion paper 451, Carnegie-Mellon University.

Levenbach, H. and Cleary, J.P. (1984), The Modern Forecaster, Belmont, CA: Lifetime Learning Publications (a division of Wadsworth, Inc.), 129-133.

Makridakis, S. and Wheelwright, S.C. (1978), Interactive Forecasting: Univariate and Multivariate Methods, Second Edition, San Francisco: Holden-Day, 198-201.

Wheelwright, S.C. and Makridakis, S. (1973), Forecasting Methods for Management, Third Edition, New York: Wiley-Interscience, 123-133.