BibTeX
@INCOLLECTION{
         Battermann1998PfK,
       author = "A. Battermann and M. Heinkenschloss",
       editor = "W. Desch and F. Kappel and K. Kunisch",
       title = "Preconditioners for {K}arush-{K}uhn-{T}ucker Matrices Arising in Optimal Control of
         Distributed Systems",
       booktitle = "Optimal Control of Partial Differential Equations (Vorau 1996)",
       pages = "15--32",
       publisher = "Birkheuser Verlag",
       address = "Basel",
       key = "Battermann1998PfK",
       comment = "Also appeared as TR96--34, Department of Computational and Applied Mathematics, Rice
         University.",
       referred = "[Keyes2001UAD].",
       year = "1998"
}