@article{AMA_2003__2003_1_123283,
     author = {Reynaud, Eric},
     title = {Incidence algebras and algebraic fundamental group.},
     journal = {Algebra Montpellier announcements},
     year = {2003},
     volume = {2003},
     number = {1},
     zbl = {1032.16013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/AMA_2003__2003_1_123283/}
}