Spectral Analysis of Economic Time Series J. F. Hannan; C. W. J. Granger; M. Hatanaka Econometrica 1965 33(3), 653
Studies in the National Balance Sheet of the United States. Vol. I G. S. Dorrance; Raymond W. Goldsmith; Robert E. Lipsey; Morris Mendelson Econometrica 1965 33(4), 887
The Mathematical Theory of Optimal Processes Richard Bellman; L. S. Pontryagin; V. G. Boltyanskiĭ; R. V. Gamkrelidze; E. F. Mishchenko; K. N. Trirogoff; L. W. Neustadt Econometrica 1965 33(1), 252