Zhygalova, S.L. and Olshanskyi, I.G. 2014. Hugo Zapałowicz’s species of Iris and Gladiolus (Iridaceae): Typification of his names. Phytotaxa. 163, 1 (Mar. 2014), 59–60. DOI:https://doi.org/10.11646/phytotaxa.163.1.8.