Brennan, A., Harris, S., & Hiscock, S. (2003). The population genetics of sporophytic self-incompatibility in Senecio squalidus L. (Asteraceae): Avoidance of mating constraints imposed by low S-allele number.

Brennan, A., S. Harris, and S. Hiscock. The Population Genetics of Sporophytic Self-incompatibility in Senecio Squalidus L. (Asteraceae): Avoidance of Mating Constraints Imposed by Low S-allele Number. 2003.

Brennan, A., et al. The Population Genetics of Sporophytic Self-incompatibility in Senecio Squalidus L. (Asteraceae): Avoidance of Mating Constraints Imposed by Low S-allele Number. 2003.