Memorable quotes for Clerks II [online]. Internet Movie Database [cit. 2009-09-01]. Dostupné online. (anglicky)
nih.gov
ncbi.nlm.nih.gov
A community-wide outbreak of hepatitis A: risk factors for infection among homosexual and bisexual men. [online]. Atlanta: pubmed.gov, 1995-8 [cit. 2009-09-01]. Dostupné online. PMID7625417. (anglicky)