Beatty, G. E., Montgomery, W. I., Spaans, F., Tosh, D. G., & Provan, J. (2016). Pure species in a continuum of genetic and morphological variation: Sympatric oaks at the edge of their range. Ann Bot.

Beatty, Gemma E., W. Ian Montgomery, Florentine Spaans, David G. Tosh, a Jim Provan. "Pure Species in a Continuum of Genetic and Morphological Variation: Sympatric Oaks At the Edge of Their Range." Ann Bot 2016.

Beatty, Gemma E., et al. "Pure Species in a Continuum of Genetic and Morphological Variation: Sympatric Oaks At the Edge of Their Range." Ann Bot 2016.