Aeyels D., Peuteman J. (1998) A new asymptotic stability criterion for nonlinear time-variant differential equations. IEEE Trans. Automat. Control 43:968-971.
Aeyels D., Peuteman J. (1999) On exponential stability of nonlinear time-varying differential equations. Automatica J. IFAC 35:1091-1100.
De Leenheer P., Aeyels D. (1999) A note on uniform boundedness of a class of positive systems. Proceedings of the 38th IEEE Conference on Decision and Control , Phoenix, Arizona; 2575-2579.
Morin P., Samson C. (1997) Time-varying exponential stabilization of a rigid spacecraft with two control torques. IEEE Trans. Automat. Control 42:528-535.
Peuteman J., Aeyels D. (1999) Averaging results and the study of uniform asymptotic stability of homogeneous differential equations that are not fast time-varying. SIAM J. Control Optim. 37:997-1010.
Peuteman J., Aeyels D. (1998) A note on exponential stability of partially slowly time-varying nonlinear systems. 4th IFAC Nonlinear Control Systems Design Symposium , Enschede, The Netherlands; 471-475.
Rosenbrock H.H. (1963) The stability of linear time-dependent control systems. J. Electronics Control 15(1):73-80.
Rugh W.J. Linear System Theory, Prentice Hall, Englewood Cliffs, NJ; 1993.
Solo V. (1994) On the stability of slowly time-varying linear systems. Math. Control Signals Systems 7:331-350.
Yoshizawa T. (1966) Stability theory by Liapunov's second method. Math. Soc. Jap., Tokyo; .