  Introducing Nijenhuis forms on Lie-infinity algebras gives a general frame to
understand deformations of the latter. We give here a Nijenhuis interpretation
of a deformation of an arbitrary Lie algebroid into a Lie-infinity algebra.
Then we show that Nijenhuis forms on Lie-infinity algebras also give a short
and efficient manner to understand Poisson-Nijenhuis structures and, more
generally, the so-called exact Poisson quasi-Nijenhuis structures with
background.
