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Saurer, Matthias; Maurer, Stefan; Matyssek, Rainer; Landolt, Werner; Günthardt-Goerg, Madeleine S.; Siegenthaler, Ulrich (1995). The influence of ozone and nutrition on δ13C in Betula pendula. Oecologia, 103(4), pp. 397-406. Springer 10.1007/BF00328677
