http://www.jstor.org/page/termsConfirm.jsp?redirectUri=/stab...
http://www.google.com/url?sa=t&ct=res&cd=5&url=h...
edit: this might be better for GRW http://arxiv.org/pdf/quant-ph/0406094v2
http://www.google.com/url?sa=t&ct=res&cd=1&url=h...