OBADAL, M., ČERMÁK, R., RAAB, M., VERNEY, V., COMMEREUC, S., FRAISSE, F. Structure evolution of .alpha.- and .beta.-polypropylenes upon UV irradiation: A multiscale comparison. Polymer Degradation and Stability. 2005, 88(3), 532-539. ISSN 0141-3910. E-ISSN 1873-2321.