The original version of this chapter was inadvertently published with an incorrect title. It should be as follows: Solution of Differential Flat Systems Using Variational Calculus.

The original version of this chapter was inadvertently published with an incorrect affiliation for the chapter author. The affiliation of the chapter author, Prof. Louadj should be as follows:

MAIAA-ENAC, Toulouse 31055, France and Laboratoire d’Informatique, de Mathématiques, et de Physique pour l’Agriculture et les Forêts (LIMPAF), Bouira, Algeria. e-mail: louadj_kahina@yahoo.fr