Back-angle enhancement in the 'ANTPOT.28 SI' ('ANTPOT.16 O','ANTPOT.20 NE')'ANTPOT.24 MG' reactions at 'E IND.CM' =31.57 mev - Portezan Filho, O; Lepine-Szily, Alinka; Lichtenthaler Filho, Rubens; Villari, A C C (International Nuclear Physics Conference, 1989)