3[1]BOGDUK N, LOCAL.Anesthetic blocks of the second cervical ganglion: a technique with application in occipital headache[J].Cephalalgia,1981,1: 41- 50.
4[2]HU JW,VERNON H.Properties of nervous in the upper cervical dorsal horn that receive cervical afferent inputs in rats[C].Proceeding of the internal conference on spinal manipulation, 1991:35- 36.
