@Article{npg-10-493-2003,
AUTHOR = {Mu, M. and Duan, W. S. and Wang, B.},
TITLE = {Conditional nonlinear optimal perturbation and its applications},
JOURNAL = {Nonlinear Processes  in Geophysics},
VOLUME = {10},
YEAR = {2003},
NUMBER = {6},
PAGES = {493--501},
URL = {http://www.nonlin-processes-geophys.net/10/493/2003/},
DOI = {10.5194/npg-10-493-2003}
}