1[1]Culberson, C. F. & Kristinsson, H. 1970. A standardized method for the identification of lichen products. J. Chromatogr. 46: 85~93.
2[2]Culberson, C. F. 1972. Improved conditions and new data for the identification of lichen products by a standardized thin layer chromatographic method. J. Chromatogro. 72: 113~125.
3[3]Wei J. C. 1991. An enumeration of lichens in China. International Academic Publishers, Beijing, China.