@article{10_4153_CMB_1971_068_3,
     author = {O'Shaughnessy, C. D.},
     title = {On the {Block} {Structure} of {Quartic} {Designs}},
     journal = {Canadian mathematical bulletin},
     pages = {377--389},
     year = {1971},
     volume = {14},
     number = {3},
     doi = {10.4153/CMB-1971-068-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1971-068-3/}
}