A manuscript about the intra-annual oxygen isotope pattern in tree-ring cellulose and its climatic significance is published in Annals of Forest Science:
Szymczak, S., Bräuning, A., Häusser, M., Garel, E., Huneau, F., Santoni, S. (2019): The relationship between climate and the intra-annual oxygen isotope patterns from pine trees: a case study along an elevation gradient on Corsica, France. Annals of Forest Science, 76:76. (https://doi.org/10.1007/s13595-019-0860-9)