1. Characterizing the codimension of zero singularities for time-delay systems;Boussaada;Acta Appl. Math.,2016
2. The Confluent Hypergeometric Function with Special Emphasis on Its Applications;Buchholz,1969
3. Hypergeometric symbolic calculus. II. Systems of confluent equations;Debiard;Bull. Sci. Math.,2003
4. Sur les zéros des polynomes-sections de ex;Dieudonné;Bull. Sci. Math.,1935
5. Higher Transcendental Functions. Vol. I;Erdélyi,1981