BibTeX
@INPROCEEDINGS{
         Chao1990Sot,
       AUTHOR = "Chao, W. C. and Chang, L. P.",
       TITLE = "Status of the development of a variational data assimilation system using the adjoint
         method at {G}oddard {L}aboratory for {A}tmospheres",
       BOOKTITLE = "Proceedings of the International Symposium on Assimilation of Observations in
         Meteorology and Oceanography, World Meteorological Organization, Geneva, Switzerland",
       YEAR = "1990",
       PAGES = "355--358",
       REFERRED = "[Talagrand1991TUo]."
}