"Pseudo" pseudo forces in gauge synchronization theories
  The role of extra terms in Newton's second law that arise as a result of non-Einstein synchronization is explored. Although such extra terms have been interpreted as pseudo forces that constrain physical theory to a unique method of synchronization (the Einstein, or standard, synchronization), a fully relativistic analysis indicates that such extra terms do not invalidate the conventionalist thesis of synchronization. 
Robert D. Klauber