Mosyakin, Sergei L., Dirk C. Albach, and Myroslav V. Shevera. 2023. “On Veronica paczoskiana and the Real Identity and Typification of V. spicata Var. pseudoorchidea (Plantaginaceae)”. Phytotaxa 618 (1). Auckland, New Zealand:47-58. https://doi.org/10.11646/phytotaxa.618.1.4.