A determination of the average up-down, strange and charm quark masses from Nf = 2+1+1

1. Carrasco, N.
2. Dimopoulos, P.
3. Frezzotti, R.
4. Lami, P.
5. Lubicz, V.
6. Palao, D.
7. Picca, E.
8. Riggio, L.
9. Rossi, G.C.
10. Sanfilippo, F.
11. Simula, S.
12. Tarantino, C.