(1) Zhang Jingsen, et al. 2019. Mineralogy and geochemistry of the coal seam of Shanxi Formation in Guotun Mine, Juye Coalfield, North China. Energy Exploration & Exploitation,37(6):1779-1803.
(2) 張景森, 等. 2019. 邯鄲梧桐莊礦煤中硅化木地球化學特征研究. 河北工程大學學報(自然科學版).36(2):70-73.