@ARTICLE{Bouchard2013Probabilistic,
   author = {Alexandre Bouchard-C\^ot\'e},
   title = {{A} {N}ote on {P}robabilistic {M}odels over {S}trings: {I}nference and  {R}epresentation with {I}ndexed {M}atrices},
   journal = {arXiv},
   year = {2013}
}