@incollection{Frieden19,
author = {Richard P. Bocker and B. Roy Frieden},
title = {Eight-by-Eight Spacetime Matrix Operator and Its Applications},
booktitle = {Progress in Relativity},
publisher = {IntechOpen},
address = {Rijeka},
year = {2019},
editor = {Calin Gheorghe Buzea and Maricel Agop and Leo Butler},
chapter = {2},
doi = {10.5772/intechopen.86982},
url = {https://doi.org/10.5772/intechopen.86982}
}