Cosmological perturbations in modified teleparallel gravity models
  Cosmological perturbations are considered in $f(T)$ and in scalar-torsion
$f(\varphi)T$ teleparallel models of gravity. Full sets of linear perturbation
equations are accurately derived and analysed at the relevant limits.
Interesting features of generalisations to other teleparallel models, spatially
curved backgrounds, and rotated tetrads are pointed out.
