@article {MR1120754,
    AUTHOR = {Coron, Jean-Michel and Praly, Laurent},
     TITLE = {Adding an integrator for the stabilization problem},
   JOURNAL = {Systems Control Lett.},
  FJOURNAL = {Systems \& Control Letters},
    VOLUME = {17},
      YEAR = {1991},
    NUMBER = {2},
     PAGES = {89--104},
      ISSN = {0167-6911},
     CODEN = {SCLEDC},
   MRCLASS = {93D15},
  MRNUMBER = {MR1120754 (92f:93099)},
}