Revisiting Absorbing Phase Transition in Energy Exchange Models
  A recent study of conserved Manna model, with both discrete and continuous variable, indicates that absorbing phase transitions therein belong to the directed percolation (DP) universality class. In this context we revisit critical behaviour in energy exchange models with a threshold. Contrary to the previous claims [PRE 83, 061130 (2011), arXiv:1102.1631], our results indicate that both the maximal and minimal versions of this model belong to the DP class. 
Urna Basu, Mahashweta Basu and P. K. Mohanty
cond-mat.stat-mech