AN IMPROVED EXTRACTION PROTOCOL FOR THERAPEUTIC DABIGATRAN MONITORING USING HPLC-MS/MS Статья Kozlov A.V., Ramenskaya G.V., Sychev D.A., Vlasov A.M., Makarenkova L.M., Stepanova E.S., Gegechkori V.I., Agatonovic-Kustrin S., Chistyakov V.V.I. Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences. Elsevier B.V.. Том 1130-1131. 2019.