Paul A. Catlin, Iqbalunnisa T. N. Janakiraman, N. Srinivasan. Hamilton cycles and closed trails in iterated line graphs. Journal of Graph Theory, 14(3):347-364, 1990. [doi]
@article{CatlinJS90,
  title = {Hamilton cycles and closed trails in iterated line graphs},
  author = {Paul A. Catlin and Iqbalunnisa T. N. Janakiraman and N. Srinivasan},
  year = {1990},
  doi = {10.1002/jgt.3190140308},
  url = {http://dx.doi.org/10.1002/jgt.3190140308},
  researchr = {https://researchr.org/publication/CatlinJS90},
  cites = {0},
  citedby = {0},
  journal = {Journal of Graph Theory},
  volume = {14},
  number = {3},
  pages = {347-364},
}