215.H. Zhang, J. Wu, D. Fang, Y. Zhang, Hierarchical mechanical metamaterials built with scalable tristable elements for ternary logic operation and amplitude modulation. Science Advances, 2021, 7: eabf1966.

1. H. Zhang, J. Wu, D. Fang, Y. Zhang, Hierarchical mechanical metamaterials built with scalable tristable elements for ternary logic operation and amplitude modulation. Science Advances, 2021, 7: eabf1966.