Fuzzy PERT in series-parallel graphs. - Hélène Fargier; Vincent Galvagnon; Didier Dubois (FUZZ-IEEE, 2000)

On latest starting times and floats in activity networks with ill-known durations. - Didier Dubois; Hélène Fargier; Vincent Galvagnon (Eur. J. Oper. Res., 2003)