Kyriakos Papadopoulos, Santanu Acharjee, Basil K. Papadopoulos: The order on the light cone and its induced topology. In: International Journal of Geometric Methods in Modern Physics. 15. Jahrgang, Nr.5, 1. Mai 2018, S.1850069–1851572, doi:10.1142/S021988781850069X, arxiv:1710.05177, bibcode:2018IJGMM..1550069P (arxiv.org [PDF]).
Kyriakos Papadopoulos, Santanu Acharjee, Basil K. Papadopoulos: The order on the light cone and its induced topology. In: International Journal of Geometric Methods in Modern Physics. 15. Jahrgang, Nr.5, 1. Mai 2018, S.1850069–1851572, doi:10.1142/S021988781850069X, arxiv:1710.05177, bibcode:2018IJGMM..1550069P (arxiv.org [PDF]).
Kyriakos Papadopoulos, Santanu Acharjee, Basil K. Papadopoulos: The order on the light cone and its induced topology. In: International Journal of Geometric Methods in Modern Physics. 15. Jahrgang, Nr.5, 1. Mai 2018, S.1850069–1851572, doi:10.1142/S021988781850069X, arxiv:1710.05177, bibcode:2018IJGMM..1550069P (arxiv.org [PDF]).