BibTeX
@INPROCEEDINGS{
         Courtier1990dda,
       AUTHOR = "Courtier, P. and Thepaut, J. N. and Talagrand, Olivier",
       TITLE = "4-dimensional data assimilation using the adjoint of a primitive equation model",
       BOOKTITLE = "Proceedings of the International Symposium on Assimilation of Observations in
         Meteorology and Oceanography, World Meteorological Organization, Geneva, Switzerland",
       YEAR = "1990",
       PAGES = "337--340",
       REFERRED = "[Talagrand1991TUo]."
}