@PhdThesis{spehner,
	title = "{Quelques probl\`{e}mes d'extension, de conjugaison et de présentation des sous-mono\"{i}des d'un mono\"{i}de libre.}",
	author = "Spehner, J.-C.",
	school = "Universit\'{e} Paris VII, Paris",
	year = "1976",
}

@Article{lerest,
  author    = {Barbin-Le Rest, Evelyne and Le Rest, Michel},
  title     = {Sur la Combinatoire des Codes \`{a} Deux Mots.},
  journal   = {Theor. Comput. Sci.},
  year      = {1985},
  volume    = {41},
  pages     = {61--80},
  added-at  = {2011-09-07T00:00:00.000+0200},
  biburl    = {http://www.bibsonomy.org/bibtex/253c7e2761f4ea85902779bcf0c728123/dblp},
  ee        = {http://dx.doi.org/10.1016/0304-3975(85)90060-X},
  interhash = {f84dac1c875cca36656e0d06f0f35127},
  intrahash = {53c7e2761f4ea85902779bcf0c728123},
  keywords  = {dblp},
  timestamp = {2011-09-07T00:00:00.000+0200},
}

@article{Manuch,
	author    = {J{\'{a}}n Ma{\v n}uch},
	title     = {Defect Effect of Bi-infinite Words in the Two-element Case},
	journal   = {Discret. Math. Theor. Comput. Sci.},
	volume    = {4},
	number    = {2},
	pages     = {273--290},
	year      = {2001},
	url       = {http://dmtcs.episciences.org/279},
	timestamp = {Fri, 13 Mar 2020 14:37:54 +0100},
	biburl    = {https://dblp.org/rec/journals/dmtcs/Manuch01.bib},
	bibsource = {dblp computer science bibliography, https://dblp.org},
	doi = {10.46298/dmtcs.279}
}