%0 Journal Article %A Yang, Dachun %A Yang, Sibei %T Second-order Riesz Transforms and Maximal Inequalities Associated with Magnetic Schr ödinger Operators %J Canadian mathematical bulletin %D 2015 %P 432-448 %V 58 %N 2 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-2014-060-x/ %R 10.4153/CMB-2014-060-x %F 10_4153_CMB_2014_060_x