Statistical Properties and Decay of Correlations for Interval Maps with   Critical Points and Singularities
  We consider a class of piecewise smooth one-dimensional maps with critical points and singularities (possibly with infinite derivative). Under mild summability conditions on the growth of the derivative on critical orbits, we prove the central limit theorem and a vector-valued almost sure invariance principle. We also obtain results on decay of correlations. 
Stefano Luzzatto and Ian Melbourne
math.DS