Goursat, E. (1964). Variation of solutions: Partial differential equations of the second order.
Chicago ZitierstilGoursat, Edouard. Variation of Solutions: Partial Differential Equations of the Second Order. Dover Publcations, New York, 1964.
MLA ZitierstilGoursat, Edouard. Variation of Solutions: Partial Differential Equations of the Second Order. 1964.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.