T. T. Hartley and C. F. Lorenzo, A solution to the fundamental linear fractional order differential equation, NASA, 1998.

D. Matignon, Stability properties for generalized fractional differential systems. ESAIM proceedings -Systèmes Différentiels Fractionnaires -Modèles, Méthodes et Applications, vol.5, 1998.
DOI : 10.1051/proc:1998004

A. Oustaloup, La dérivation nonentì ere. Hermès -Paris, 1995.

J. Trigeassou, T. Poinot, J. Lin, A. Oustaloup, and F. Levron, Modeling and identification of a non integer order system, In ECC, 1999.