A proof of Bell's inequality in quantum mechanics using causal   interactions
  We give a simple proof of Bell's inequality in quantum mechanics which, in conjunction with experiments, demonstrates that the local hidden variables assumption is false. The proof sheds light on relationships between the notion of causal interaction and interference between particles. 
James M. Robins, Tyler J. VanderWeele, and Richard D. Gill
stat.AP physics.hist-ph quant-ph