TY - JOUR AU - Teimuraz Pirashvili TI - Groupoid enriched categories and natural systems JO - Theory and applications of categories PY - 2005 SP - 287 EP - 293 VL - 14 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TAC_2005_14_a11/ LA - en ID - TAC_2005_14_a11 ER -