@article{10_4064_sm187_2_3,
     author = {Takeshi Katsura and Paul S. Muhly and Aidan Sims and Mark Tomforde},
     title = {Ultragraph $C^*$-algebras via topological quivers},
     journal = {Studia Mathematica},
     pages = {137--155},
     publisher = {mathdoc},
     volume = {187},
     number = {2},
     year = {2008},
     doi = {10.4064/sm187-2-3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm187-2-3/}
}