Template:Calvo, Hantson & Paiva, 2014
- Calvo, J., Hantson, S. & Paiva, J. 2014. Polygala webbiana (Polygalaceae), the first record for Europe and a synopsis of Polygala subgen. Chamaebuxus. Nordic Journal of Botany 32: 38–41. DOI: 10.1111/j.1756-1051.2013.01784.x PDF