Grímsson, F., Zetter, R., Halbritter, H., & Grimm, G. W. (2014). Aponogeton pollen from the Cretaceous and Paleogene of North America and West Greenland: Implications for the origin and palaeobiogeography of the genus(). Elsevier Scientific Pub. Co. [etc.].
Styl cytowania ChicagoGrímsson, Friðgeir, Reinhard Zetter, Heidemarie Halbritter, i Guido W. Grimm. Aponogeton Pollen From the Cretaceous and Paleogene of North America and West Greenland: Implications for the Origin and Palaeobiogeography of the Genus(). Elsevier Scientific Pub. Co. [etc.], 2014.
Styl cytowania MLAGrímsson, Friðgeir, Reinhard Zetter, Heidemarie Halbritter, i Guido W. Grimm. Aponogeton Pollen From the Cretaceous and Paleogene of North America and West Greenland: Implications for the Origin and Palaeobiogeography of the Genus(). Elsevier Scientific Pub. Co. [etc.], 2014.