Waves in one dimensional lattice
Lattice Vibrations, Physics 927, E.Y. Tsymbal.
On modifications of Newton's second law and linear continuum elastodynamics, Graeme W Milton and John R Willis, Proc. R. Soc. A 463 2007.
Arnab Banerjee, Raj Das, and Emilio P. Calius. Waves in Structured Mediums or Metamaterials: A Review, Archives of Computational Methods in Engineering, 26(4):1029-1058, September 2019.