Battista, A., Del Vescovo, D., Rizzi, N. L., & Turco, E. (2019). Frequency Shifts in Natural Vibrations in Pantographic Metamaterials under Biaxial Tests. Technische Mechanik - European Journal of Engineering Mechanics, 37(1), 1–17. https://doi.org/10.24352/UB.OVGU-2017-046