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Books about Tryfos:
Measurement of Economic Relationships by Tryfos, Peter. (Springer,2004) [Hardcover] (Jan 2, 0004)
fransoua tryfo: chitskok / φρανσουά τρυφώ: χίτσκοκ by hitchcock alfred (2006)
tryfo / τρυφώ by serge daney (1985)
TRYFOS Methods for Business Analysis and Forecasting: Texts and Cases AND Minitab Student Version 12 by Tryfos (Aug 26, 1998)