{{Cite journal| doi = 10.1007/s00508-021-01810-5| issn = 1613-7671 (Electronic) 0043-5325 (Print) 0043-5325 (Linking)| volume = 133| issue = 7-8| pages = 399–402| last1 = Fahrner| first1 = R.| last2 = Bahler| first2 = S.| last3 = Lindner| first3 = G.| title = COVID-19 lock-down significantly reduced number of surgical presentations in an emergency department| journal = Wien Klin Wochenschr| date = 2021-01-29| pmid = 33507348}}