Renormalization Ambiguities in Casimir Energy
  Some questions were recently raised about the equivalence of two methods commonly used to compute the Casimir energy: the mode summation approach and the one-loop effective potential. In this respect, we argue that the scale dependence induced by renormalization effects, displayed by the effective potential approach, also appears in the MS method. 
Luiz C. de Albuquerque (University of Sao Paulo)