lucy24 thank you for your questions because you made me remember that 4 months ago a page of mine lost her first position and I discovered that an important online magazine copied it, and it is incredible to know that such magazine was in my same city (100.000 inhabitants). Now we are friends and it help me sometimes.
The copied link say: published on (http://www.example.com/my-page/).
I still did not contact them because there is not contact page and there is no info about provider on whois database. I can say to you what another website said: Oh sorry .... bla bla and then asked to me if I could collaborate for him. But he removed the page, just yesterday discovered he copied another page of mine and he removed that one too immediatly.
So I think that removing copied pages could improve the ranking. It could be a big pain, but my website is not big, about 50 pages, so I can do it.
Aristotle you could be right, but if I remove all the copies I can solve the situation between: copies are hurting me or copies cannot do anything to me. It could be a step beyond the solution of my ranking problem.
If I undestood well you are suggesting me to use DMCA instead of contacting the websites? For time purposes or for Google ranking puroposes?