Pössel, Markus Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners;
https://ui.adsabs.harvard.edu/abs/2019EJPh...40b5602P (Any fulltext)
Pössel, M. (2019). Teaching cosmology with special relativity: piecewise inertial frames as a model for cosmic expansion. European Journal of Physics, 40, 025602.