GAIDASHEV, I. A., and SYROESHKIN. “DEVELOPMENT OF A REFERENCE SAMPLE FOR RAPID ANALYSIS OF AN ELEMENTAL COMPOSITION OF MEDICINAL PLANT RAW MATERIALS”. International Journal of Applied Pharmaceutics, vol. 16, no. 2, Mar. 2024, pp. 174-81, doi:10.22159/ijap.2024v16i2.49870.