@article{COMIM_2021_29_2_a1,
     author = {Ignatev, Mikhail V.},
     title = {Gradedness of the set of rook placements in $A_{n-1}$},
     journal = {Communications in Mathematics},
     pages = {171--182},
     year = {2021},
     volume = {29},
     number = {2},
     mrnumber = {4285749},
     zbl = {07426416},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/COMIM_2021_29_2_a1/}
}