Table of contents : Front Matter....Pages i-x Dependence of Solutions on Small Parameters. Applications of Relaxation Oscillations....Pages 1-37 Second-Order Systems. Asymptotic Calculation of Solutions....Pages 39-137 Second-Order Systems. Almost-Discontinuous Periodic Solutions....Pages 139-170 Systems of Arbitrary Order. Asymptotic Calculation of Solutions....Pages 171-198 Systems of Arbitrary Order. Almost-Discontinuous Periodic Solutions....Pages 199-216 Back Matter....Pages 217-228