Fumi, M. “Distinguishing Between Leptidea sinapis and L. reali (Lepidoptera: Pieridae) Using a Morphometric Approach: Impact of Measurement Error on the Discriminative Characters”. Zootaxa, vol. 1819, no. 1, July 2008, pp. 40–54, doi:10.11646/zootaxa.1819.1.3.