%0 Journal Article %A B.O. Bainson %A N.D. Gilbert %T The homology of principally directed ordered groupoids %J Homology, homotopy, and applications %D 2020 %P 163-172 %V 22 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4310/HHA.2020.v22.n2.a10/ %R 10.4310/HHA.2020.v22.n2.a10 %G en %F HHA_2020_22_2_a9