BibTeX
@ARTICLE{
         Errico1997Wia,
       author = "R. Errico",
       title = "What is an Adjoint Model",
       journal = "Bulletin of the American Meteorological Society",
       pages = "2577--2591",
       ad_area = "Meteorology",
       ad_theotech = "Adjoint",
       year = "1997",
       volume = "78",
       number = "11"
}