I can download this by hand in IE.
http://scholar.google.com/scholar.ris?q=info:j8ymU9rzMsEJ:scholar.google.com/&output=citation&hl=zh-CN&as_sdt=2000&
I had this problem trying to download an image from a SharePoint site url. In my case setting the user-agent
to Other or blank in the header wasn't enough, I had to set the user-agent
as follows instead:
client.Headers.Add("user-agent", " Mozilla/5.0 (Windows NT 6.1; WOW64; rv:25.0) Gecko/20100101 Firefox/25.0");
That solution came from this answer.