Kovaleva, A.; Osmachko, A.; Ilina Т.; Goryacha, O.; Omelyanchik, L.; Grytsyk, A.; Koshovyi, O. Chemical Composition of Essential Oils from Flowers of Veronica Longifolia L., Veronica Incana L. And Veronica Spicata L. SR: PS 2022, 69-79.