Apparent singularities of linear difference equations with polynomial coefficients.

Sergei A. Abramov Moulay A. Barkatou Mark van Hoeij Apparent singularities of linear difference equations with polynomial coefficients. 117-133 2006 17 Appl. Algebra Eng. Commun. Comput. 2 http://dx.doi.org/10.1007/s00200-005-0193-9 db/journals/aaecc/aaecc17.html#AbramovBH06