Delphine Boucher, Philippe Gaillard, Felix Ulmer. Fourth order linear differential equations with imprimitive group. In J. Rafael Sendra, editor, Symbolic and Algebraic Computation, International Symposium ISSAC 2003, Drexel University, Philadelphia, Pennsylvania, USA, August 3-6, 2003, Proceedings. pages 45-49, ACM, 2003. [doi]
Abstract is missing.