Vangipuram Lakshmikantham & Srinivasa G Leela 
PRACTICAL STABILITY OF NONLINEAR SYSTEMS 

This is the first book that deals with practical stability and its development. It presents a systematic study of the theory of practical stability in terms of two different measures and arbitrary sets and demonstrates the manifestations of general Lyapunov’s method by showing how this effective technique can be adapted to investigate various apparently diverse nonlinear problems including control systems and multivalued differential equations.