An exact exponential-time algorithm for the Directed Maximum Leaf Spanning Tree problem. Binkele-Raible, D. & Fernau, H. J. Discrete Algorithms, 15:43–55, 2012.
An exact exponential-time algorithm for the Directed Maximum Leaf Spanning Tree problem [link]Paper  doi  bibtex   
@article{DBLP:journals/jda/Binkele-RaibleF12,
  author    = {Daniel Binkele{-}Raible and
               Henning Fernau},
  title     = {An exact exponential-time algorithm for the Directed Maximum Leaf
               Spanning Tree problem},
  journal   = {J. Discrete Algorithms},
  volume    = {15},
  pages     = {43--55},
  year      = {2012},
  url       = {https://doi.org/10.1016/j.jda.2012.03.006},
  doi       = {10.1016/j.jda.2012.03.006},
  timestamp = {Sun, 28 May 2017 01:00:00 +0200},
  biburl    = {https://dblp.org/rec/bib/journals/jda/Binkele-RaibleF12},
  bibsource = {dblp computer science bibliography, https://dblp.org}
}

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