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Hu, H., Shen, J., Zhou, Z. and Ou, Z. 2017. Relaxation Oscillations in Singularly Perturbed Generalized Lienard Systems with Non-Generic Turning Points. Mathematical Modelling and Analysis. 22, 3 (May 2017), 389-407. DOI:https://doi.org/10.3846/13926292.2017.1315344.