Vibration of initially stressed carbon nanotubes under magneto-thermal environment for nanoparticle delivery via higher-order nonlocal strain gradient theoryM. R. Farajpour, A. R. Shahidi, F. Tabataba’i-Nasab and A. FarajpourEur. Phys. J. Plus, 133 6 (2018) 219DOI: https://doi.org/10.1140/epjp/i2018-12039-5