Lopez-Vicente M, Garcia-Aymerich J, Torrent-Pallicer J, Forns J, Ibarluzea J, Lertxundi N, Gonzalez L, Valera-Gran D, Torrent M, Dadvand P, Vrijheid M, Sunver J. Are early physical activity and sedentary behaviors related to working memory at 7 and 14 years of age? J Pediatr. 2017 Sep;188:35-41.e1. doi: 10.1016/j.jpeds.2017.05.079.