Stanford University
Stanford University: Conventionality of Simultaneity
This site from Stanford University is on the topic of simultaneity in relativity.
Texas Education Agency
Texas Gateway: Fictitious Forces and Non Inertial Frames: The Coriolis Force
By the end of this section, you will be able to discuss the inertial frame of reference, discuss the non-inertial frame of reference, and describe the effects of the Coriolis force.