@article{ELA_1999__5__a5,
     author = {Cheon, G.-S. and Johnson, C.R. and Lee, S.-G. and Pribble, E.J.},
     title = {The possible numbers of zeros in an orthogonal matrix},
     journal = {The electronic journal of linear algebra},
     pages = {19--23},
     publisher = {mathdoc},
     volume = {5},
     year = {1999},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ELA_1999__5__a5/}
}