Determining Liouvillian first integrals for dynamical systems in the plane and an integrability analysis. - J. Avellar; M. S. Cardoso; L. G. S. Duarte; L. A. C. P. da Mota (Comput. Phys. Commun., 2014)

Dealing with rational second order ordinary differential equations where both Darboux and Lie find it difficult: The S-function method. - J. Avellar; M. S. Cardoso; L. G. S. Duarte; L. A. C. P. da Mota (Comput. Phys. Commun., 2019)