paragraph {
   display:block;
   padding:10px;
   border:solid; border-width:4px; border-color:#CCCCCC;}

reference {
   display:inline;
   font-style:italic;
   color:#CC3333;
   border:solid; border-width:2px; border-color:#CCCCCC;}

keyword {
   display:inline;
   font-weight:bold;
   color:#990000;
   border:solid; border-width:2px; border-color:#CCCCCC;}