@article{10_37236_1203,
     author = {E. F. Assmus Jr.},
     title = {On 2-ranks of {Steiner} triple systems},
     journal = {The electronic journal of combinatorics},
     year = {1995},
     volume = {2},
     doi = {10.37236/1203},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1203/}
}