ELECTRONIC	h   t   t   p   c o l o n   s l a s h   s l a s h   a r x i v dot o r g   s l a s h   a b s   s l a s h   o   e i g h t   o   o n e dot o   e i g h t   s i x   o n e	http://arxiv.org/abs/0801.0861	1