TY  - JOUR
AU  - Anders Kock
TI  - Projective lines as groupoids with projection structure
JO  - Theory and applications of categories
PY  - 2014
SP  - 371
EP  - 388
VL  - 29
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/TAC_2014_29_a12/
LA  - en
ID  - TAC_2014_29_a12
ER  -