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4. Pre-Columbian purslane (Portulaca oleracea L.) in the New World;Byrne;Nature,1975
5. Etude pollinique du remplissage de la grotte du Broion (Vicenza, Italie): paléoclimatologie du Würmien en Vénétie;Cattani;Bulletin de l'A.F.E.Q.,1983