@Article{npg-13-425-2006,
AUTHOR = {Nariyuki, Y. and Hada, T.},
TITLE = {Remarks on nonlinear relation among phases and frequencies in modulational instabilities of parallel propagating Alfvén waves},
JOURNAL = {Nonlinear Processes  in Geophysics},
VOLUME = {13},
YEAR = {2006},
NUMBER = {4},
PAGES = {425--441},
URL = {http://www.nonlin-processes-geophys.net/13/425/2006/},
DOI = {10.5194/npg-13-425-2006}
}