Not sure this counts as a top paper, but certainly the journal is not one would expect given the very serious content, and the authors:
M.F.Atiyah and GB. Segal, Twisted K -theory. Ukrainian Math. Bull. 1 (2004) http://arxiv.org/abs/math/0407054https://arxiv.org/abs/math/0407054
I'm having trouble even finding the journal online... (AustMS/ARC ranking was B, for those keeping score at home - note that these rankings are no longer updated or current, and are officially deprecated by the Australian Research Council)