@article{10_37236_995,
     author = {He Chen and Xueliang Li},
     title = {Color neighborhood union conditions for long heterochromatic paths in edge-colored graphs},
     journal = {The electronic journal of combinatorics},
     year = {2007},
     volume = {14},
     doi = {10.37236/995},
     zbl = {1182.05070},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/995/}
}