Geometric Simultaneity and the Continuity of Special Relativity. Coleman, Robert Alan amd Hermann Korte. An Empirical, Purely Spatial Criterion for the Planes of F-Simultaneity. Earman, John and John D. Norton. Malament and Zabell on Gibbs Phase Averaging.
Acceleration is Relative.
Sarkar, Sahotra and John Stachel. A New Twist in the Conventionality of Simultaneity Debate.