@article{10_1017_S001708950101014X,
     author = {Bennett, G. K. and Grannell, M. J. and Griggs, T. S.},
     title = {Cyclic bi-embeddings of {Steiner} triple systems on 31 points},
     journal = {Glasgow mathematical journal},
     pages = {145--151},
     year = {2001},
     volume = {43},
     number = {1},
     doi = {10.1017/S001708950101014X},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S001708950101014X/}
}