We present results and first epoch parsec-scale images from a monitoring program on five \gamma –ray loud blazars selected on the basis of their total flux density variability .
We observed 0048 - 097 , 0235+164 , 0954+658 , 1510 - 089 and 1749+096 with the Very Long Baseline Array simultaneously at 8.4 GHz and 22 GHz .
Comparison between our high quality images and previous results from the literature suggest that 0954+658 and 1510 - 089 are superluminal radio sources , with a Lorentz factor \gamma of the order of \sim 2 - 3 .