A systematic cross-search for radio/infrared counterparts of XMM-Newton sources

1. Combi, J.A.
2. Colombo, J.F.A.
3. Pellizza, L.
4. López-Santiago, J.
5. Romero, G.E.
6. Martí, J.
7. Muñoz-Arjonilla, A.J.
8. Sánchez-Ayaso, E.
9. Luque-Escamilla, P.L.
10. Sánchez-Sutil, J.R.