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Alegria, A., Guerrica-Echevarria, E., Goitiandia, L., Telleria, I., & Colmenero, J. (1995). .alpha.-Relaxation in the Glass Transition Range of Amorphous Polymers. 1. Temperature Behavior across the Glass transition. Macromolecules, 28(5), 1516–1527. doi:10.1021/ma00109a025 
10.1021/ma00109a025