Hieu, L. T., Son, L. L., Nhung, N. M., Vu, H. X. A., & Thi, T. T. A. (2019). Determination of luteolin from extracts of Helicteres hirsuta by HPLC. Hue University Journal of Science: Natural Science, 128(1B), 43-47. https://doi.org/10.26459/hueuni-jns.v128i1B.5195