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Planck Collaboration, P. A. R. Ade, N. Aghanim, C. Armitage-Caplan, M. Arnaud, M. Ashdown, F. Atrio-Barandela, J. Aumont, C. Baccigalupi, A. J. Banday, R. B. Barreiro, J. G. Bartlett, N. Bartolo, E. Battaner, R. Battye, K. Benabed, A. Benoît, A. Benoit-Lévy, J. -P. Bernard, M. Bersanelli, P. Bielewicz, J. Bobin, J. J. Bock, A. Bonaldi, L. Bonavera, J. R. Bond, J. Borrill, F. R. Bouchet, M. Bridges, M. Bucher: Planck 2013 results. XXV. Searches for cosmic strings and other topological defects. In: Astronomy & Astrophysics. 571. Jahrgang, 2013, S.A25, doi:10.1051/0004-6361/201321621, arxiv:1303.5085, bibcode:2014A&A...571A..25P (amerikanisches Englisch).
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Planck Collaboration, P. A. R. Ade, N. Aghanim, C. Armitage-Caplan, M. Arnaud, M. Ashdown, F. Atrio-Barandela, J. Aumont, C. Baccigalupi, A. J. Banday, R. B. Barreiro, J. G. Bartlett, N. Bartolo, E. Battaner, R. Battye, K. Benabed, A. Benoît, A. Benoit-Lévy, J. -P. Bernard, M. Bersanelli, P. Bielewicz, J. Bobin, J. J. Bock, A. Bonaldi, L. Bonavera, J. R. Bond, J. Borrill, F. R. Bouchet, M. Bridges, M. Bucher: Planck 2013 results. XXV. Searches for cosmic strings and other topological defects. In: Astronomy & Astrophysics. 571. Jahrgang, 2013, S.A25, doi:10.1051/0004-6361/201321621, arxiv:1303.5085, bibcode:2014A&A...571A..25P (amerikanisches Englisch).
