Weighted restriction type estimates for grushin operators and   application to spectral multipliers and bochner-riesz summability
  We prove weighted restriction type estimates for Grushin operators. These estimates are then used to prove sharp spectral multiplier theorems as well as Bochner-Riesz summability results with sharp exponent. 
Peng Chen (IMB), El Maati Ouhabaz (IMB)
math.AP math.FA