Allan, E., & Pannell, J. (2009). Rapid divergence in physiological and life-history traits between northern and southern populations of the British introduced neo-species, Senecio squalidus.

Allan, E., and J. Pannell. Rapid Divergence in Physiological and Life-history Traits Between Northern and Southern Populations of the British Introduced Neo-species, Senecio Squalidus. 2009.

Allan, E., and J. Pannell. Rapid Divergence in Physiological and Life-history Traits Between Northern and Southern Populations of the British Introduced Neo-species, Senecio Squalidus. 2009.