9J R Eheringer. Stable isotopes and carbon cycle processes in forests and grasslands [J]. Plant Biology, 2002, 4 : 181 - 189. 被引量:1
10Keeling C D, J F S Chin, T P Whorl. Increased activity of northern vegetation in inferred from atmospheric CO2 measurements [J]. Nature, 1996,382:146 - 149. 被引量:1