@Article{npg-5-241-1998,
AUTHOR = {Romanova, N. N.},
TITLE = {Hamiltonian approach to the derivation of evolution equations for wave trains in weakly unstable media},
JOURNAL = {Nonlinear Processes  in Geophysics},
VOLUME = {5},
YEAR = {1998},
NUMBER = {4},
PAGES = {241--253},
URL = {http://www.nonlin-processes-geophys.net/5/241/1998/},
DOI = {10.5194/npg-5-241-1998}
}