Solution of a problem on non-negative subset sums. - Konrad Engel; Caterina Nardi (Eur. J. Comb., 2012)

A Minimum Problem for Finite Sets of Real Numbers with Nonnegative Sum. - Giampiero Chiaselotti; Giuseppe Marino 001; Caterina Nardi (J. Appl. Math., 2012)