Dynamic behaviour of composites reinforced with needles from fir treesAlexandru Ioan Rădoi, Cosmin Mihai Miriţoiu, Mihaela Bogdan, Marius Marinel Stănescu, Dumitru Bolcu and Ionuţ GeoneaMATEC Web Conf., 343 (2021) 01001DOI: https://doi.org/10.1051/matecconf/202134301001