@article {MR3059870,
    AUTHOR = {Puno{\v{s}}evac, Predrag and Robinson, Sam L.},
     TITLE = {Asymptotically minimal uncertainty states for
              time-dependent oscillators},
   JOURNAL = {J. Math. Phys.},
  FJOURNAL = {Journal of Mathematical Physics},
    VOLUME = {54},
      YEAR = {2013},
    NUMBER = {1},
     PAGES = {012106, 16},
      ISSN = {0022-2488},
     CODEN = {JMAPAQ},
   MRCLASS = {35Q41 (81Q05)},
  MRNUMBER = {3059870},
       DOI = {10.1063/1.4773874},
       URL = {http://dx.doi.org/10.1063/1.4773874},
}