Media type: E-Article Title: The long engagement of the emperor penguin Contributor: Ancel, André; Gilbert, Caroline; Beaulieu, Michaël imprint: Springer Science and Business Media LLC, 2013 Published in: Polar Biology Language: English DOI: 10.1007/s00300-013-1285-9 ISSN: 0722-4060; 1432-2056 Keywords: General Agricultural and Biological Sciences Origination: Footnote: