8[1]Yapp C J, Epstein S. Climatic implications of D/H ratios of meteoric water over north America(9500—22,000B.P.) as inferred from ancient wood cellulose C-H hydrogen[J]. Earth and Planetary Science Letters, 1977, 34:333-350.
9[2]Schiegl W E. Deuterium content of peat as a paleoclimatic recorder[J]. Science, 1972, 175: 512.
10[3]Brenninkmeijer C A M, Geel B van, Mook W G. Variations in the D/H and 18O/16O ratios in cellulose extracted from a peat bog core[J]. Earth and Planetary Science Letters, 1982, 61: 283-290.