@article {1803.07473, archivePrefix = {arXiv}, eprint = {1803.07473}, primaryClass = {astro-ph.CO}, author = {Marvin Pinkwart and Dominik J. Schwarz}, title = {Test of the cosmological principle by means of CMB multipole vectors for $l \leq 50$}, year = {2018}, url = {http://arxiv.org/abs/1803.07473} }