Kutzora, S., L. Puerto Valencia, A. Weber, J. Huß, L. Hendrowarsito, U. Nennstiel-Ratzel, C. Herr, and S. Heinze. “Residential Crowding and Asthma in Preschool Children, a Cross-Sectional Study”. Allergologia et Immunopathologia 47, no. 4 (August 15, 2019): 386–400. Accessed April 26, 2026. https://www.all-imm.com/index.php/aei/article/view/305.