Media type: E-Article Title: Graph switching, 2-ranks, and graphical Hadamard matrices Contributor: Abiad, Aida; Butler, Steve; Haemers, Willem H. imprint: Elsevier BV, 2019 Published in: Discrete Mathematics Language: English DOI: 10.1016/j.disc.2018.11.022 ISSN: 0012-365X Origination: Footnote: Access State: Open Access