@article {BoRaSa14,
    AUTHOR = {Bostan, Alin and Raschel, Kilian and Salvy, Bruno},
     TITLE = {Non-{D}-finite excursions in the quarter plane},
   JOURNAL = {J. Combin. Theory Ser. A},
  FJOURNAL = {Journal of Combinatorial Theory. Series A},
    VOLUME = {121},
      YEAR = {2014},
     PAGES = {45--63},
       DOI = {10.1016/j.jcta.2013.09.005},
       URL = {http://dx.doi.org/10.1016/j.jcta.2013.09.005},
}