Freire, F. and Litim, D. F. and Pawlowski, J. M. (2001) Gauge invariance, background fields and modified Ward identities. (Preprint)
Freire, F. and Litim, D. F. (1999) Charge cross-over at the U(1)-Higgs phase transition. (Preprint)
Litim, D. F. and Pawlowski, J. M. (1999) On Gauge Invariant Wilsonian Flows.