  In the present paper we extend the definition of slice-torus invariant to
links. We prove a few properties of the newly-defined slice-torus link
invariants: the behaviour under crossing change, a slice genus bound, an
obstruction to strong sliceness, and a combinatorial bound. Furthermore, we
provide an application to the computation of the splitting number. Finally, we
use the slice-torus link invariants, and the Whitehead doubling to define new
strong concordance invariants for links, which are proven to be independent
from the corresponding slice-torus link invariant.
