Everard ML (February 2009). „Acute bronchiolitis and croup”. Pediatr. Clin. North Am.svezak 56. (broj 1): str. 119.–133., x–xi. DOI:10.1016/j.pcl.2008.10.007. PMID19135584.
Russell KF, Liang Y, O'Gorman K, Johnson DW, Klassen TP (2011). Klassen, Terry P. ur. „Glucocorticoids for croup”. Cochrane Database Syst Rev1 (1): str. CD001955.. DOI:10.1002/14651858.CD001955.pub3. PMID21249651.
Port C. (April 2009). „Towards evidence based emergency medicine: best BETs from the Manchester Royal Infirmary. BET 4. Dose of dexamethasone in croup”. Emerg Med Jsvezak 26. (broj 4): str. 291.–292.. DOI:10.1136/emj.2009.072090. PMID19307398.
Vorwerk C, Coats T (2010). Vorwerk, Christiane. ur. „Heliox for croup in children”. Cochrane Database Syst Revsvezak 2. (broj 2): str. CD006822.. DOI:10.1002/14651858.CD006822.pub2. PMID20166089.
etymonline.com
Online Etymological Dictionary, croup. 13. rujna 2010.
Everard ML (February 2009). „Acute bronchiolitis and croup”. Pediatr. Clin. North Am.svezak 56. (broj 1): str. 119.–133., x–xi. DOI:10.1016/j.pcl.2008.10.007. PMID19135584.
Russell KF, Liang Y, O'Gorman K, Johnson DW, Klassen TP (2011). Klassen, Terry P. ur. „Glucocorticoids for croup”. Cochrane Database Syst Rev1 (1): str. CD001955.. DOI:10.1002/14651858.CD001955.pub3. PMID21249651.
Port C. (April 2009). „Towards evidence based emergency medicine: best BETs from the Manchester Royal Infirmary. BET 4. Dose of dexamethasone in croup”. Emerg Med Jsvezak 26. (broj 4): str. 291.–292.. DOI:10.1136/emj.2009.072090. PMID19307398.
Vorwerk C, Coats T (2010). Vorwerk, Christiane. ur. „Heliox for croup in children”. Cochrane Database Syst Revsvezak 2. (broj 2): str. CD006822.. DOI:10.1002/14651858.CD006822.pub2. PMID20166089.