Perfect bases for differential equations. - Sebastian Gann; Herwig Hauser (J. Symb. Comput., 2005)

Multivariate linear recurrences and power series division. - Herwig Hauser; Christoph Koutschan (Discret. Math., 2012)

Encoding Algebraic Power Series. - Maria Emilia Alonso; F. J. Castro-Jiménez; Herwig Hauser (Found. Comput. Math., 2018)

Normal forms of ordinary linear differential equations in arbitrary characteristic. - Florian Fürnsinn; Herwig Hauser (CoRR, 2023)