1. D. Cox, J. Little, and D. O’Shea, Ideals, Varieties, and Algorithms: An introduction to Computational Algebraic Geometry and Commutative Algebra, Springer, New York (1997).
2. B. Buchberger, “Gröbner bases: An algorithmic method in polynomial ideal theory,” in: Progress, Directions, and Open Problems in Multidimensional Systems Theory (N. K. Bose, ed.), D. Reidel, Dordrecht (1985), pp. 184–232.
3. C. Riquier, Les systèmes d’équations aux dérivées partielles, Gauthier-Villars, Paris (1909).
4. M. Janet, Leçons sur les systémes des équations aux dérivées partielles, Gauthier-Villars, Paris (1929).
5. J. F. Pommaret, Systems of Partial Differential Equations and Lie Pseudogroups, Gordon and Breach, New York (1978).