@article{Lopez-Perez2019, author = "Nelyan Lopez-Perez", title = "{Detection of Early Stages of Degradation on PPTA Fibers Through the Use of Positron Annihilation Lifetime Spectroscopy}", year = "2019", month = "8", url = "https://hammer.purdue.edu/articles/thesis/Detection_of_Early_Stages_of_Degradation_on_PPTA_Fibers_Through_the_Use_of_Positron_Annihilation_Lifetime_Spectroscopy/9037472", doi = "10.25394/PGS.9037472.v1" }