On Liouvillian Solutions of Homogeneous Linear Differential Equations. - Felix Ulmer; Jacques Calmet (ISSAC, 1990)

On Algebraic Solutions of Linear Differential Equations with Primitive Unimodular Galois Group. - Felix Ulmer (AAECC, 1991)

On Liouvillian Solutions of Linear Differential Equations. - Felix Ulmer (Appl. Algebra Eng. Commun. Comput., 1991)

Entwurf von Algorithmen zur Berechnung Liouvillescher Lösungen von linearen gewöhnlichen Differentialgleichungen. - Felix Ulmer (Kovač, 1991)

Liouvillian Solutions of Third Order Linear Differential Equations: New Bounds and Necessary Conditions. - Michael F. Singer; Felix Ulmer (ISSAC, 1992)

On a Third Order Differential Equation whose Differential Galois Group is the Simple Group of 168 Elements. - Michael F. Singer; Felix Ulmer (AAECC, 1993)

Galois Groups of Second and Third Order Linear Differential Equations. - Michael F. Singer; Felix Ulmer (J. Symb. Comput., 1993)

Liouvillian and Algebraic Solutions of Second and Third Order Linear Differential Equations. - Michael F. Singer; Felix Ulmer (J. Symb. Comput., 1993)

Irreducible Linear Differential Equations of Prime Order. - Felix Ulmer (J. Symb. Comput., 1994)

Necessary conditions for liouvillian solutions of (third order) linear differential equations. - Michael F. Singer; Felix Ulmer (Appl. Algebra Eng. Commun. Comput., 1995)

Note on Kovacic's algorithm. - Felix Ulmer; Jacques-Arthur Weil (SIGSAM Bull., 1995)

Constructing a Third-Order Linear Differential Equation. - Willi Geiselmann; Felix Ulmer (Theor. Comput. Sci., 1997)

Liouvillian Solutions of Linear Differential Equations of Order Three and Higher. - Mark van Hoeij; Jean-François Ragot; Felix Ulmer; Jacques-Arthur Weil (J. Symb. Comput., 1999)

Computing the Galois group of a polynomial using linear differential equations. - Olivier Cormier; Michael F. Singer; Felix Ulmer (ISSAC, 2000)

How to solve linear differential equations: An outline. - Felix Ulmer (Program. Comput. Softw., 2000)

Linear Differential Operators for Polynomial Equations. - Olivier Cormier; Michael F. Singer; Barry M. Trager; Felix Ulmer (J. Symb. Comput., 2002)

Fourth order linear differential equations with imprimitive group. - Delphine Boucher; Philippe Gaillard; Felix Ulmer (ISSAC, 2003)

Liouvillian solutions of third order differential equations. - Felix Ulmer (J. Symb. Comput., 2003)

Note on algebraic solutions of differential equations with known finite Galois group. - Felix Ulmer (Appl. Algebra Eng. Commun. Comput., 2005)

Skew-cyclic codes. - Delphine Boucher; Willi Geiselmann; Felix Ulmer (Appl. Algebra Eng. Commun. Comput., 2007)

Skew constacyclic codes over Galois rings. - Delphine Boucher; Patrick Solé; Felix Ulmer (Adv. Math. Commun., 2008)

Codes as Modules over Skew Polynomial Rings. - Delphine Boucher; Felix Ulmer (IMACC, 2009)

Skew codes of prescribed distance or rank. - Lionel Chaussade; Pierre Loidreau; Felix Ulmer (Des. Codes Cryptogr., 2009)

Coding with skew polynomial rings. - Delphine Boucher; Felix Ulmer (J. Symb. Comput., 2009)

Key Exchange and Encryption Schemes Based on Non-commutative Skew Polynomials. - Delphine Boucher; Philippe Gaborit; Willi Geiselmann; Olivier Ruatta; Felix Ulmer (PQCrypto, 2010)

A Note on the Dual Codes of Module Skew Codes. - Delphine Boucher; Felix Ulmer (IMACC, 2011)

Linear codes using skew polynomials with automorphisms and derivations. - Delphine Boucher; Felix Ulmer (Des. Codes Cryptogr., 2014)

Self-dual skew codes and factorization of skew polynomials. - Delphine Boucher; Felix Ulmer (J. Symb. Comput., 2014)

Extended Abstract: Codes as Modules over Skew Polynomial Rings. - Felix Ulmer (C2SI, 2015)

Dualilty Preserving Gray Maps: (Pseudo) Self-dual Bases and Symmetric Bases. - Steve Szabo; Felix Ulmer (CoRR, 2015)

Editorial: Coding and Cryptography 2019. - Anne Canteaut; Gohar M. Kyureghyan; Alexander Pott; Felix Ulmer (Des. Codes Cryptogr., 2020)

A Gröbner Approach to Dual-Containing Cyclic Left Module (θ, δ)-Codes Rg/Rf ⊂ R/Rf over Finite Commutative Frobenius Rings. - Hedongliang Liu; Cornelia Ott; Felix Ulmer (CoRR, 2023)