Country: Algeria Argentina Armenia Australia Austria Bangladesh Belarus Belgium Brazil Bulgaria Canada Chile China Colombia Croatia Cuba Czech Republic Denmark Egypt Estonia Finland France Germany Greece Hong Kong Hungary Iceland India Indonesia Iran, Islamic Republic Of Ireland Israel Italy Japan Jordan Kenya Korea, Republic Of Kuwait Lebanon Lithuania Malaysia Mexico Morocco Netherlands New Zealand Nigeria Norway Pakistan Philippines Poland Portugal Puerto Rico Romania Russian Federation Saudi Arabia Singapore Slovakia Slovenia South Africa Spain Sweden Switzerland Taiwan, Province of China Thailand Tunisia Turkey Ukraine United Arab Emirates United Kingdom United States Uruguay Venezuela Viet Nam     Period: 2006-2007 2005-2006 2004-2005 2003-2004 2002-2003 2001-2002 2000-2001 1999-2000 1998-1999 1997-1998 1996-1997

Map type: Co-citation networks Bubble charts