Kosachev, P. A., D. Albach, and A. L. Ebel. 2015. “Check-List of Veronica Subg. Pseudolysimachium (Plantaginaceae) of Siberia”. Turczaninowia 18 (3), 84–95. https://doi.org/10.14258/turczaninowia.18.3.4.