@article{10_37236_2266,
     author = {Harold Ward},
     title = {Block designs with {SDP} parameters},
     journal = {The electronic journal of combinatorics},
     year = {2012},
     volume = {19},
     number = {3},
     doi = {10.37236/2266},
     zbl = {1253.05040},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/2266/}
}