@article{CMJ_2008_58_1_a15,
     author = {Okamoto, Futaba and Zhang, Ping and Saenpholphat, Varaporn},
     title = {The upper traceable number of a graph},
     journal = {Czechoslovak Mathematical Journal},
     pages = {271--287},
     year = {2008},
     volume = {58},
     number = {1},
     mrnumber = {2402537},
     zbl = {1174.05040},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2008_58_1_a15/}
}