1. Armour-Brown, A. and I. Nichol, 1970, Regional geochemical reconnaissance and the location of metallogenic provinces: Econ. Geol., v. 65, p. 312–330.
2. Bus, A. A. and S. V. Grigorian, 1977, Geochemical exploration methods for mineral deposits (English version), Wilmette: Applied Publishing House, p. 1–277.
3. Bolviken, B., K. Kullerud, and R. R. Loucks, 1990, Geochemical and metallogenic provinces: a discussion initaated by results from geochemical mapping across northern Fennoscandia, in Darnley, A. G. and Garrett, R. G., eds., International geochemical mapping: J. Geochem. Explor., v. 39, p. 49–90.
4. Cheng Hangxin, 1994, Research on the representativeness of wide-spaced sampling and its application in mineral exploration (Master thesis): Langfang, Institute of Geophysical and Geochemical Exploration, Ministry of Geology and Mineral Resources, p. 1–114 (in Chinese).
5. Cheng Hangxin, Sheng Xiachu, Yang Guangsheng et al., 1996, Wide-spaced floodplain sediment sampling covering the whole China: pilot survey for international geochemical mapping, in Xie Xuejing, ed., Proc. 30th International Geol. Congr. on Geochemistry: The Netherlands, International Science Publishers, p. 89–109.