@article{10_21136_CMJ_1991_102504,
     author = {Nebesk\'y, Ladislav},
     title = {$N_2$-locally connected graphs and their upper embeddability},
     journal = {Czechoslovak Mathematical Journal},
     pages = {731--735},
     year = {1991},
     volume = {41},
     number = {4},
     doi = {10.21136/CMJ.1991.102504},
     mrnumber = {1134962},
     zbl = {0760.05030},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1991.102504/}
}