H=W

It's a paper showing that two methods of defining Sobolev spaces, one which uses H's with subscripts and superscripts and one that uses W's, give rise to the same spaces.  Unfortunately I don't remember the citation information.

**Citation information**

    @ARTICLE{MeySer1964,
      author = {Meyers, Norman G. and Serrin, James},
      title = {{H = W}},
      journal = {Proc. Natl. Acad. Sci. USA},
      year = {1964},
      volume = {51},
      pages = {1055-1056},
      number = {6},
      file = {MeySer1964.pdf:MeySer1964.pdf:PDF},
      owner = {ww278},
      timestamp = {2010.05.03},
      url = {http://www.pnas.org/content/51/6/1055.short}
    }