You are right, It was a search result. I had problems with the link I found in the Wikipedia ( http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.90....) but not sure if simply I was filling the wrong entry box in the submit page.
I imagine google checks that search redirect links actually come from a search result (SR) page, for example by checking the referer.
Should this post be flagged because it is a duplicate bypassing the dup detection by using a google SR link? Perhaps.
I'm not implying that this was OP's intention, just that from what basic understanding of SEO I have, Google takes into consideration click through rates of a link, higher click throughs resulting in more favorable rankings.
So, theoretically, if you could get a lot of people to visit an article using Google's search link, instead of a direct link, would that somehow convince Google to rank it more favorably?
Again, not something I'm accusing the OP of, just generally wondering.