%0 Journal Article %@ 1866-7414 %A Sigmund, K. %A Helmberg, G. %D 1996 %F iiasa:4692 %I Springer %J Mathematical Intelligencer %N 4 %P 47-50 %R 10.1007/BF03026753 %T Nestor of mathematicians: Leopold Vietoris turns 105 %U https://pure.iiasa.ac.at/id/eprint/4692/ %V 18