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2. Ananthakrishnan, G.; Xia, X.; Elman, C.; Singer, S.; Paris, H. S.; Gal-On, A.; Gaba, V. Shoot production in squash (Cucurbita pepo) by in vitro organogenesis. Plant Cell Rep. 21:739–746; 2003.
3. APHIS. Applications for deregulated status for cucurbit crops in the USA (data downloaded 1 January 2002), http://www.aphis.usda.gov/ ppq/biotech/not_reg.html; 2002 (on February 19, 2004 this site was not available, although some of this data was found at http://www.isb.vt.edu/cfdocs/biopetitionsl.cfm or http://www.aphis.usda.gov/brs/status/petday.html).
4. APHIS. Website for information on biotechnology permits, http://www.aphis. usda.gov/bbep/; 2004a (confirmed February 19, 2004).
5. APHIS. Environmental assessments and determinations in PDF format for deregulated crops are available at http://www.aphis.usda.gov/brs/not_reg.html; 2004b (confirmed February 19, 2004).