The conference book
Selected peer-reviewed papers presented at the Second Hermann Minkowski Meeting on the Foundations of Spacetime Physics, dedicated to the 110th anniversary of the publication of Minkowski’s paper “Space and Time,” 13-16 May 2019, Albena, Bulgaria. Minkowski Institute Press 2020
On Amazon you can find info with short presentation on each chapter, contributors
and content here Also book info in PDF
How Minkowski Could Have Discovered Superlunary Lorentz Transformations and six Dimensional Spacetime.
My abstract to the book Abstract to conferences which my chapter
is based on with many of the references in the chapter 2018 ,