@article{SLC_2018_80B_a79,
     author = {Thomas Browning and Max Hopkins, and Zander Kelley},
     title = {Doppelgangers: the {Ur-Operation} and {Posets} of {Bounded} {Height}},
     journal = {S\'eminaire lotharingien de combinatoire},
     publisher = {mathdoc},
     volume = {80B},
     year = {2018},
     url = {http://geodesic.mathdoc.fr/item/SLC_2018_80B_a79/}
}