TY  - RPRT
TI  - Nonlinear envelope-function equation and strongly localized vibrational modes in anharmonic lattices.
AU  - YA Kosevich
PY  - 1993
DO  - 10.1103/physrevb.47.3138
UR  - https://pubmed.ncbi.nlm.nih.gov/10006396/
ID  - 10006396
ER  -