Besides citations, you may also collect some other evidences to prove that your result has been implemented or used by others. You also need some more "comparative evidences" to prove that you are better than your peers.
I may be able to help you on this issue. I have helped lots of people here with their RFEs. Please search "fsa2000" in this forum and you will see many examples. My email address is: fsa2000@gmail.com