Diatom-oxygen isotope record from high-altitude Lake Petit (2200 m a.s.l.) in the Mediterranean Alps: shedding light on a climatic pulse at 4.2 ka oleh R. Cartier, R. Cartier, R. Cartier, F. Sylvestre, C. Paillès, C. Sonzogni, M. Couapel, A. Alexandre, J.-C. Mazur, E. Brisset, E. Brisset, C. Miramont, F. Guiter