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=10.1.1.90.7173&

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=10.1.1.90.7173&rep=rep1&type=pdf 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.