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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
Matyssek, Rainer; Günthardt-Goerg, Madeleine S.; Saurer, Matthias; Keller, Theodor (1992). Seasonal growth, δ13C in leaves and stem, and phloem structure of birch (Betula pendula) under low ozone concentrations. Trees - Structure and Function, 6(2), pp. 69-76. Springer 10.1007/BF00226583
