Gradient $L^q$ theory for a class of nondiagonal elliptic systems
  We show that the new result on H\"older continuity of solutions to a class of nondiagonal elliptic systems with $p$-growth in [2] can be used to improve the $L^q$ theory for such systems. 
Miroslav Bul\'i\v{c}ek, Martin Kalousek, Petr Kaplick\'y, V\'aclav   M\'acha
math.AP