@article{10_37236_1491,
     author = {Malcolm Greig},
     title = {Some pairwise balanced designs},
     journal = {The electronic journal of combinatorics},
     year = {2000},
     volume = {7},
     doi = {10.37236/1491},
     zbl = {0938.05007},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1491/}
}