Taylor, David Winship; Peakman, Torren M.; Hickey, Leo J.; Fago, Frederick J.; Huizinga, Bradley J.; Dahl, Jeremy; Moldowan, J. Michael (1994-08-05). "The Molecular Fossil Record of Oleanane and Its Relation to Angiosperms". Science. 265 (5173): 768–771. Bibcode:1994Sci...265..768M. doi:10.1126/science.265.5173.768. ISSN0036-8075. PMID17736275.
Taylor, David Winship; Peakman, Torren M.; Hickey, Leo J.; Fago, Frederick J.; Huizinga, Bradley J.; Dahl, Jeremy; Moldowan, J. Michael (1994-08-05). "The Molecular Fossil Record of Oleanane and Its Relation to Angiosperms". Science. 265 (5173): 768–771. Bibcode:1994Sci...265..768M. doi:10.1126/science.265.5173.768. ISSN0036-8075. PMID17736275.
Taylor, David Winship; Peakman, Torren M.; Hickey, Leo J.; Fago, Frederick J.; Huizinga, Bradley J.; Dahl, Jeremy; Moldowan, J. Michael (1994-08-05). "The Molecular Fossil Record of Oleanane and Its Relation to Angiosperms". Science. 265 (5173): 768–771. Bibcode:1994Sci...265..768M. doi:10.1126/science.265.5173.768. ISSN0036-8075. PMID17736275.
Taylor, David Winship; Peakman, Torren M.; Hickey, Leo J.; Fago, Frederick J.; Huizinga, Bradley J.; Dahl, Jeremy; Moldowan, J. Michael (1994-08-05). "The Molecular Fossil Record of Oleanane and Its Relation to Angiosperms". Science. 265 (5173): 768–771. Bibcode:1994Sci...265..768M. doi:10.1126/science.265.5173.768. ISSN0036-8075. PMID17736275.