1. S. S. Abhyankar and C. L. Bajaj, Automatic parameterization of rational curves and surfaces III. Algebraic plane curves. Comput. Aided Geom. Design 5 (1988), 309–321.
2. C. Briot and T. Bouquet, Intégrations des équations différentielles au moyen des fonctions elliptiques. Journal de l’Ecole Polytechnique t. XXI.
3. M. Bronstein, Linear ordinary differential equations: Breaking through the order 2 barrier. In: Proceedings of ISSAC 1992, pp. 42–48. ACM Press, New York (1992).
4. J. G. Campbell, A criterion for the polynomial solutions of a certain Riccati equation. American Math. Monthly 61 (1952), 388–389.
5. M. M. Carnicer, The Poincaré problem in the nondicritical case. Ann. Math. 140(2) (1994), 289–294.