F. Gagnepain, Supplement a la Flore Generale de l'Indo-Chine, 1938.

N. B^an, Checklist of Plant Species in Vietnam, 2003.

H. Do, V. Nguyen, and G. Nguyen, Selected Medicinal Plants in Vietnam, 1999.

J. B. Wang and J. R. Mantsch, -tetrahydropalamatine: a potential new medication for the treatment of cocaine addiction, Future Medicinal Chemistry, vol.121, issue.2, pp.177-186, 2014.
DOI : 10.1016/j.ejphar.2008.11.031

S. Sangmalee, A. Laorpaksa, and S. Sukrong, A topoisomerase II poison screen of ethnomedicinal Thai plants using a yeast cell-based assay, Journal of Ethnopharmacology, vol.142, issue.2, pp.432-437, 2012.
DOI : 10.1016/j.jep.2012.05.013

M. A. Bezerra, R. E. Santelli, E. P. Oliveira, L. S. Villar, and L. A. Escaleira, Response surface methodology (RSM) as a tool for optimization in analytical chemistry, Talanta, vol.76, issue.5, pp.965-977, 2008.
DOI : 10.1016/j.talanta.2008.05.019

D. C. Montgomery, Design and Analysis of Experiments, 2001.

B. Stanton, L. Zhu, and C. H. Atwood, Experiments in General Chemistry Featuring MeasureNet: Guided Inquiry, Seft-directed, and Capstone, Brooks/Cole Cengage Learning, 2010.

H. N. Johansen, V. Glitsø, and K. E. Knudsen, Influence of Extraction Solvent and Temperature on the Quantitative Determination of Oligosaccharides from Plant Materials by High-Performance Liquid Chromatography, Journal of Agricultural and Food Chemistry, vol.44, issue.6, pp.1470-1474, 1996.
DOI : 10.1021/jf950482b

. Fig, Scanning electron microscopy images of (a) untreated Stephania cambodica tuber extract, (b) sample treated by percolation, and (c) by ultrasounds Accelerating voltage (kV), magnification, and working distance (mm) are (a) 15, pp.23-38