Lambda Oscillations and the Conservation Laws
  Lowe, Bassalleck, Burkhardt, Rusek, Stephenson, and Goldman assert, under the assumption of decays at fixed space-time points, that Kaon induced Lambda oscillations disappear. We find, under the same assumption, that energy conservation and momentum conservation also disappear. Ordinary particles can exhibit quantum oscillations. 
A. Widom and Y.N. Srivastava (Physics Department, Northeastern   University, Boston, MA, USA)