@misc{SE12,
    author =    { Barbara Simons and others },
    title =     { Letter to President Obama on Voting },
    date =      { 2012-12-05 },
    OPTyear =   { 2012 },
    OPTmonth =  { December 5, },
    urla =      { <a href="http://www.verifiedvoting.org/wp-content/uploads/2012/12/PresidentLetter.pdf">VV-posting</a> },
    urlb =      { <a href="http://blog.lib.umn.edu/cspg/electionacademy/2012/12/youve_got_mail_mr_president_tw.php">blog</a> },                  
}