OPTIMIZATION OF THE EXTRACTION PROCESS FROM YELLOW CAMELLIA FLOWERS (CAMELLIA CUCPHUONGENSIS NINH & ROSMANN) COLLECTED IN PHU THO PROVINCE USING RESPONSE SURFACE METHODOLOGY. JMM-NIMM 2026, 31 (1+2), pp. 96 - 104. https://doi.org/10.63240/jmm-nimm.2026.1+2.215.