It is well known, that the analysis of variation of radio-sources coordinates in time is overwhelmingly important, since they can affect seriously the precision and accuracy of the CRF as well as the precision and accuracy of the nutation and Universal Time estimations obtained from the processing of VLBI observations. Up to now, four commonly used stability criteria based on different schemes have been used for the reference radiosources selection. Four lists of reference radio sources based on these schemes have been compiled. But significant inconsistencies between these lists were found. In this paper we tried to analyze an impact of these different selection schemes on the CRF solution as well as on radio source coordinate time-series....