@article{cfa192536cb34069a7ea890dbfae1250,
title = "Evidence of changing intrinsic water use efficiency under rising atmospheric CO2 concentrations in Boreal Fennoscandia from subfossil leaves and tree ring d13C ratios.",
author = "M. Gagen and W. Finsinger and F. Wagner-Cremer and D. McCarroll and N.J. Loader and I. Robertson and R. Jalkanen and G. Young and A. Kirchhefer",
year = "2011",
language = "Undefined/Unknown",
volume = "17",
pages = "1064--1072",
journal = "Global Change Biology",
issn = "1354-1013",
publisher = "Wiley-Blackwell Publishing Ltd",
number = "2",
}