  We present pc-scale images of ten Compact Symmetric Objects (CSO) candidates
observed with the European VLBI network (EVN). Five radio sources have been
observed at 1.6 GHz, and five more at 2.3/8.4 GHz, the latter subsample with
the inclusion in the VLBI array of 3 antennae normally used for geodesy. These
objects were selected from existing samples of GHz Peaked Spectrum (GPS) radio
sources with the purpose to find and/or confirm the CSO classification. These
new VLBI observations allow us to confirm the classification of two CSO
candidates, and to find a few new ones. The association of GPS radio galaxies
with a CSO morphology is strengthened by our findings, and this result suggests
an efficient way to increase the number of known CSOs by means of VLBI
observations of compact radio galaxies showing a convex radio spectrum.
