On maximal functions for Mikhlin-Hoermander multipliers
  Given Mikhlin-H\"ormander multipliers $m_i$, $i=1,..., N$, with uniform estimates we prove an optimal $\sqrt{\log(N+1)}$ bound in $L^p$ for the maximal function $\sup_i|\cF^{-1}[m_i\hat f]|$ and related bounds for maximal functions generated by dilations. 
Loukas Grafakos, Petr Honzik and Andreas Seeger