1. Anker-Nilssen , T. Strøm , H. Barrett , B. Bustnes , J. O. Christensen-Dalsgaard , S. Descamps , S. Systad , G. H. 2017 Key-site monitoring in Norway 2016, including Svalbard and Jan Mayen 14 www.seapop.no
2. Measurements and weight changes of Norwegian adult puffins Fratercula arctica and Kittiwakes Rissa tridactyla during the breeding season;Barrett;Ringing & Migration,1985
3. The status of breeding seabirds in mainland Norway;Barrett;Atlantic Seabirds,2006
4. Fitting Linear mixed-effects models using lme4;Bates;Journal of Statictical Software,2015
5. AIC model selection and multimodel inference in behavioural ecology: Some background, observations, and comparisons;Burnham;Behavioral Ecology and Sociobiology,2011