Scale invaraince of renormalisation theory

[spaghetti3451]

Hi, I was wondering if anyone could refer me to a journal article that talks about the scale symmetric properties of renormalisation theory in the context of simple quantum-mechanical system governed by a delta function potential.

 

[vanhees71]

Googling gives this paper as one of the first hits:

http://www.sbfisica.org.br/rbef/pdf/v21_336.pdf

I haven't checked, how reliable this might be, but from a first glance it looks as it could help.