“OPTIMIZATION OF THE EXTRACTION PROCESS FROM YELLOW CAMELLIA FLOWERS (CAMELLIA CUCPHUONGENSIS NINH & ROSMANN) COLLECTED IN PHU THO PROVINCE USING RESPONSE SURFACE METHODOLOGY” (2026) Tạp chí Dược liệu, 31(1+2), pp. pp. 96 – 104. doi:10.63240/jmm-nimm.2026.1+2.215.