Bröms, Kristina. ”A Nationwide Study of Asthma and Allergy in Swedish Preschool Children With Special Reference to Environment, Daycare, Prevalence, Co-Ocurrence and Incidence”. Socialmedicinsk Tidskrift, vol. 87, nr 5-6, mars 2011, s. 437, doi:10.62607/smt.v87i5-6.43940.