1. Anon . 1991a.EGRET Reference manual, 305Washington: Statistics and Epidemiology Research Corp. Seattle.
2. Anon . 1993.SAS Technical Report P‐243, SAS/STAT Software: The GENMOD Procedure, Release 6.09 236Cary, NC: SAS Institute Inc. ISBN 1–55544–547–0
3. Phytochrome Intermediates and Action Spectra for Light Perception by Dry Seeds
4. Bewley , J. D. and Black , M. 1994.Seeds. Physiology of Development and Germination., Second Edition, 236–246. New York and London: Plenum Press. ISBN 0–306–44747–9