by Tasson, Jay
Year of Publication 2020

by Ishihara, Hideki, Matsuno, Satsuki
Published in Progress of theoretical and experimental physics (01.02.2022)

by Kreiss, H-O, Winicour, J
Published in Classical and quantum gravity (21.03.2014)

by Kleban, Matthew
Published in Classical and quantum gravity (21.10.2011)

by Kleban, Matthew
Published in arXiv.org (13.07.2011)

by Friedrich, Helmut
Year of Publication 03.04.1998

by Friedrich, Helmut
Published in arXiv.org (06.04.1998)