Global variable and impact parameter determination in nucleus-nucleus collisions below 100 mev / u - Peter, J; Sullivan, J P; Cussol, D; Bizard, G; Brou, R; Louvel, M; Patry, J P; Regimbart, R; Steckmeyer, J C; Tamain, B; Crema, Edilson; Doubre, H (Nuclear Physics a, 1990)