?url_ver=Z39.88-2004&rft_id=10.1007%2FBF03026753&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Sigmund%2C+K.&rft.aulast=Sigmund&rft.aufirst=K.&rft.issue=4&rft.volume=18&rft.date=December+1996&rft.issn=1866-7414&rft.atitle=Nestor+of+mathematicians%3A+Leopold+Vietoris+turns+105&rft.title=Mathematical+Intelligencer&rft.pages=47-50&rft.genre=article