Yang, Z.-N., W. Yang, Q. Peng, Q. He, Y. Feng, S. Luo, and Z. Yu. “Volatile Phytochemical Composition of Rhizome of Ginger After Extraction by Headspace Solid-Phase Microextraction, Petrol Ether Extraction and Steam Distillation Extraction”. Bangladesh Journal of Pharmacology, vol. 4, no. 2, Oct. 2009, pp. 136-43, doi:10.3329/bjp.v4i2.3232.