%0 Journal Article %A Lambek, J. %T Grammar as Mathematics %J Canadian mathematical bulletin %D 1989 %P 257-273 %V 32 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1989-039-x/ %R 10.4153/CMB-1989-039-x %F 10_4153_CMB_1989_039_x