The triple oxygen isotope composition of phytoliths as a proxy of continental atmospheric humidity: insights from climate chamber and climate transect calibrations oleh A. Alexandre, A. Landais, C. Vallet-Coulomb, C. Piel, S. Devidal, S. Pauchet, C. Sonzogni, M. Couapel, M. Pasturel, P. Cornuault, J. Xin, J.-C. Mazur, F. Prié, I. Bentaleb, E. Webb, F. Chalié, J. Roy