Fagaceae pollen from the early Cenozoic of West Greenland: revisiting Engler’s and Chaney’s Arcto-Tertiary hypotheses - Grímsson, Friðgeir; Zetter, Reinhard; Grimm, Guido W.; Pedersen, Gunver Krarup; Pedersen, Asger Ken; Denk, Thomas (Plant Systematics and Evolution, 2014)