Wang, J.; Liu, Y.; Chen, H.; Chen, L.; Wei, Z.; Liu, R.; Long, F.; Wan, D. Chemical Changeability of Essential Oils in Chenpi and Qingpi from the Same Origin by Gas Chromatography-Mass Spectrometry Compiled With Automated Mass Spectral Deconvolution and Identification System. ajc 2013, 25, 6434-6442.