The Brauer characters of the sporadic simple Harada-Norton group and its   automorphism group in characteristics 2 and 3
  We determine the 2-modular and 3-modular character tables of the sporadic simple Harada-Norton group and its automorphism group. 
Gerhard Hiss, J\"urgen M\"uller, Felix Noeske, and Jon Thackray
math.RT