Neutron-Antineutron Oscillations: Theoretical Status and Experimental   Prospects
  This paper summarizes the relevant theoretical developments, outlines some ideas to improve experimental searches for free neutron-antineutron oscillations, and suggests avenues for future improvement in the experimental sensitivity. 
D. G. Phillips II, W. M. Snow, K. Babu, S. Banerjee, D. V. Baxter, Z.   Berezhiani, M. Bergevin, S. Bhattacharya, G. Brooijm...
hep-ex hep-ph nucl-ex nucl-th physics.ins-det