Hi Susana Santos,
My name is Zaffwan and currently doing my postgraduate study in Swinburne, Melbourne. We have a same interest because I also looking at methods to evaluate logos. By the way, my background is Communication Design and perhaps we can share and exchange refferences and ideas.
You probably have to broaden your research area into topic such as Corporate Visual Identity (CVI) since the specific topic about logo is very limited. For start, it’s also worth looking at papers by T.C Melewar, J.M.T. Balmer, W. Olins and C. Van Riel.
Cheers!
Zaffwan Idris