TY - RPRT TI - Variational approach to the modulational instability. AU - Z Rapti AU - P G Kevrekidis AU - A Smerzi AU - A R Bishop PY - 2004 DO - 10.1103/physreve.69.017601 UR - https://pubmed.ncbi.nlm.nih.gov/14995759/ ID - 14995759 ER -