<sod >Sergei Glazyevâs comments come as the Ukrainian president prepares to sign the full association agreement at the EU summit in Brussels amid a precarious ceasefire between government troops and pro-Russian rebels.< eod>< sod > Sergei Glazyevâs comments came shortly before the Ukrainian president signed the full association agreement at the EU summit in Brussels amid a precarious ceasefire between government troops and pro-Russian rebels.< eod>