Johannessen, Kjersti, Elisabeth Bjørnestad, Ada Kristine Ofrim Nilsen, Einar Ylvisåker, Merete Nornes-Nymark, Mari Engeseter, Lillian Pedersen, og Eivind Aadland. «Associations for Preschool Environmental Quality With Outdoor Time and Moderate-to-Vigorous Physical Activity in Norwegian Preschools». Journal for Research in Arts and Sports Education 4, no. 2 (desember 28, 2020). åpnet mars 28, 2024. https://jased.net/index.php/jased/article/view/2485.