N
[NU02] Matti Nykänen et Esko Ukkonen. The Exact Path Length Problem. Journal of Algorithms 42(1):41-53. Elsevier, janvier 2002. 
@article{ja42(1)-NU,
  author =              {Nyk{\"a}nen, Matti and Ukkonen, Esko},
  title =               {The Exact Path Length Problem},
  publisher =           {Elsevier},
  journal =             {Journal of Algorithms},
  volume =              {42},
  number =              {1},
  pages =               {41-53},
  year =                {2002},
  month =               jan,
  doi =                 {10.1006/jagm.2001.1201},
}
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