NONLOCAL ANISOTROPIC ELASTIC SHELL MODEL FOR VIBRATIONS OF DOUBLE-WALLED CARBON NANOTUBES UNDER NONLINEAR VAN DER WAALS INTERACTION FORCES Article Strozzi Matteo, Smirnov Valeri V., Pellicano Francesco, Kovaleva Margarita International Journal of Non-Linear Mechanics. Elsevier BV. Vol. 146. 2022. 104172 p.