@article{10_21136_CMJ_2018_0683_15,
     author = {Grigor'yan, Alexander and Jimenez, Rolando and Muranov, Yuri},
     title = {Fundamental groupoids of digraphs and graphs},
     journal = {Czechoslovak Mathematical Journal},
     pages = {35--65},
     publisher = {mathdoc},
     volume = {68},
     number = {1},
     year = {2018},
     doi = {10.21136/CMJ.2018.0683-15},
     mrnumber = {3783584},
     zbl = {06861566},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2018.0683-15/}
}