%0 Journal Article %A Waterman, Alan G. %T The free lattice with 3 generators over $N_5$ %J Portugaliae mathematica %D 1967 %P 285-288 %V 26 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1967__26_3_115029/ %G en %F PORMA_1967__26_3_115029