Płowaś-Goral, M., Chemperek, E., Kucmin, T., Szwarc, P., & Nogalski, A. (2010). Causes of visits to outpatient pediatric clinic at University Children’s Hospital of Lublin in 2004-2006. Polish Journal of Public Health, 120(3), 281-285. https://czasopisma.umlub.pl/pjph/article/view/2090