@article{10_37236_8183,
     author = {Pawel Wocjan and Clive Elphick},
     title = {Spectral lower bounds for the orthogonal and projective ranks of a graph},
     journal = {The electronic journal of combinatorics},
     year = {2019},
     volume = {26},
     number = {3},
     doi = {10.37236/8183},
     zbl = {1419.05136},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/8183/}
}