@Article{npg-14-763-2007,
AUTHOR = {Terwisscha van Scheltinga, A. D. and Dijkstra, H. A.},
TITLE = {A comparison of the  performance of 4D-Var  in an explicit  and implicit version of a nonlinear barotropic  ocean model},
JOURNAL = {Nonlinear Processes  in Geophysics},
VOLUME = {14},
YEAR = {2007},
NUMBER = {6},
PAGES = {763--776},
URL = {http://www.nonlin-processes-geophys.net/14/763/2007/},
DOI = {10.5194/npg-14-763-2007}
}