@article{10_37236_8225,
     author = {Mark Dukes and Thomas Selig and Jason P. Smith and Einar Steingr{\'\i}msson},
     title = {Permutation graphs and the abelian sandpile model, tiered trees and non-ambiguous binary trees},
     journal = {The electronic journal of combinatorics},
     year = {2019},
     volume = {26},
     number = {3},
     doi = {10.37236/8225},
     zbl = {1418.05051},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/8225/}
}