{{Cite journal| doi = 10.1136/bmj.319.7206.352| issn = 0959-8138 (Print) 1468-5833 (Electronic) 0959-8138 (Linking)| volume = 319| issue = 7206| pages = 352| last1 = Schlegel| first1 = M.| last2 = Osterwalder| first2 = J. J.| last3 = Galeazzi| first3 = R. L.| last4 = Vernazza| first4 = P. L.| title = Comparative efficacy of three mumps vaccines during disease outbreak in Eastern Switzerland: cohort study| journal = BMJ| date = 1999-08-06| pmid = 10435956}}