Ashim Garg Adrian Rusu Straight-Line Drawings of General Trees with Linear Area and Arbitrary Aspect Ratio. 876-885 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2669&spage=876 2003 conf/iccsa/2003-3 ICCSA (3) db/conf/iccsa/iccsa2003-3.html#GargR03