A note on K<sub>4</sub>-closures in hamiltonian graph theory. Broersma, H. J. Discrete Mathematics (DM), 121(1-3):19-23, 1993.
A note on K<sub>4</sub>-closures in hamiltonian graph theory [link]Paper  bibtex   
@article{ dblp3511125,
  title = {A note on K<sub>4</sub>-closures in hamiltonian graph theory},
  author = {H. J. Broersma},
  author_short = {Broersma, H. J.},
  bibtype = {article},
  type = {article},
  year = {1993},
  key = {dblp3511125},
  id = {dblp3511125},
  biburl = {http://www.dblp.org/rec/bibtex/journals/dm/Broersma93},
  url = {http://dx.doi.org/10.1016/0012-365X(93)90533-Y},
  journal = {Discrete Mathematics (DM)},
  pages = {19-23},
  number = {1-3},
  volume = {121},
  text = {Discrete Mathematics (DM) 121(1-3):19-23 (1993)}
}

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