@Article{npg-10-289-2003,
AUTHOR = {Fr\"uh, W.-G. and Nielsen, A. H.},
TITLE = {On the origin of time-dependent behaviour in a barotropically unstable shear layer},
JOURNAL = {Nonlinear Processes  in Geophysics},
VOLUME = {10},
YEAR = {2003},
NUMBER = {3},
PAGES = {289--302},
URL = {http://www.nonlin-processes-geophys.net/10/289/2003/},
DOI = {10.5194/npg-10-289-2003}
}