@article{10_37236_1540,
     author = {Daniel A. Spielman and Mikl\'os B\'ona},
     title = {An infinite antichain of permutations},
     journal = {The electronic journal of combinatorics},
     year = {2000},
     volume = {7},
     doi = {10.37236/1540},
     zbl = {0940.05002},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1540/}
}