Phipps, J.B. 2016.

Studies in Mespilus, Crataegus, and ×Crataemespilus (Rosaceae), II. The academic and folk taxonomy of the medlar, Mespilus germanica, and hawthorns, Crataegus (Rosaceae)

. Phytotaxa. 260, 1 (May 2016), 25–35. DOI:https://doi.org/10.11646/phytotaxa.260.1.3.