1. Closure of cerebrospinal fluid leaks prevents ascending bacterial meningitis;Bernal-Sprekelsen;Rhinology,2005
2. Diagnosis of cerebrospinal fluid rhinorrhea: an evidence-based review with recommendations;Oakley;Int Forum Allergy Rhinol,2016
3. Cerebrospinal fluid leakage – reliable diagnostic methods;Mantur;Clin Chim Acta,2011
4. Clinical Guide to Laboratory Tests;Tietz,1990
5. Biological Variation: From Principles to Practice;Fraser,2001