Parashchuk, E. A., et al. “CONTENT OF HYDROXYCINNAMIC ACIDS IN HERB AND RHIZOMES AND ROOTS OF SAXIFRAGE PIMPINELLA (PIMPINELLA SAXIFRAGA L.)”. Medical and Clinical Chemistry, no. 3, Nov. 2018, pp. 90-95, doi:10.11603/mcch.2410-681X.2018.v0.i3.9571.