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Free-Volume Studies in Polyurethane Membranes by Positron Annihilation Spectroscopy

Authors: ”; M.F. Ferreira Marques, P.M. Gordo, C. Lopes Gil, Zs. Kajcsos, M.H. Gil, M.J. Mariz, A.P. de Lima

Ref.: Radiation Physics and Chemistry 68 (2003)