by Wojczulanis-Jakubas, Katarzyna, Jakubas, Dariusz, Øigarden, Trond, Lifjeld, Jan T.
Published in Animal behaviour (01.02.2009)

by Øigarden, Trond, Borge, Thomas, Lifjeld, Jan T.
Published in Journal of avian biology (01.05.2010)

by Øigarden, Trond, Lifjeld, Jan T
Published in Journal of ornithology (2013)

by Kleven, Oddmund, Øigarden, Trond, Foyn, Bjørn E., Moksnes, Arne, Røskaft, Eivin, Rudolfsen, Geir, Stokke, Bård G., Lifjeld, Jan T.
Published in Journal of ornithology (01.07.2007)

by T. Lifjeld, Jan, M. A. Harding, Ann, Mehlum, Fridtjof, Øigarden, Trond
Published in Journal of avian biology (01.11.2005)

by T. Lifjeld, Jan, M. A. Harding, Ann, Mehlum, Fridtjof, Oigarden, Trond
Published in Journal of avian biology (07.09.2005)