ELECTRONIC	h   t   t   p   c o l o n   s l a s h   s l a s h   w   w   w dot s e f u t dot u n i   d a s h   f r e i b u r g dot d   e   s l a s h   b u e r g i n e n g dot h   t   m	http://www.sefut.uni-freiburg.de/buergineng.htm	1