Ao-external fixator light: an expulsive external fixation compatile to ao tribular system. A project and study of the socio-economic commitees of the ao / asif foundation - Hontzcha, D; Weller, S; Wintsch, S; Sond, N; Hungria Neto, J S; Paccola, C A J; Grob, V (Dialogue, 1995)