Farhoodi, M., S. M. Mousavi, R. Sotudeh-Gharebagh, Z. Emam-Djomeh, A. Oromiehie, and H. Mansour. “A Study on Physical Aging of Semicrystalline Polyethylene Terephthalate below the Glass Transition Point”. Journal of Applied Research and Technology, vol. 10, no. 5, Oct. 2012, doi:10.22201/icat.16656423.2012.10.5.360.