%0 Journal Article %A Lambek, Joachim %T How to Program an Infinite Abacus %J Canadian mathematical bulletin %D 1961 %P 295-302 %V 4 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1961-032-6/ %R 10.4153/CMB-1961-032-6 %F 10_4153_CMB_1961_032_6