L. L.  Consaul and Aiken, S. G., ?Limited taxonomic value of palea intercostal characteristics in North American Festuca (Poaceae)?, Canadian Journal of Botany, vol. 71, pp. 1651-1659, 1993.

S. G.  Aiken, McJannet, C. L., Consaul, L. L., and Dallwitz, M. J., ?Biodiversity among Festuca (Poaceae) in North America: diagnostic evidence from DELTA and clustering programs, and an INTKEY package for interactive, illustrated identification and  information retrieval?, Canadian Journal of Botany, vol. 75, pp. 1527-1555, 1997.

S. G.  Aiken, Dallwitz, M. J., McJannet, C. L., Gillespie, L. J., and Consaul, L. L., ?Saxifragaceae of the Canadian Arctic Archipelago: a contribution to a DELTA database for interactive identification and illustrated information retrieval?, Canadian Journal of Botany, vol. 76, pp. 2020-2036, 1998.