@article{JAC_2013__37_4_a5,
     author = {Petrovi\'c, Sonja and Stokes, Erik},
     title = {Betti numbers of {Stanley-Reisner} rings determine hierarchical {Markov} degrees},
     journal = {Journal of Algebraic Combinatorics},
     pages = {667--682},
     publisher = {mathdoc},
     volume = {37},
     number = {4},
     year = {2013},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JAC_2013__37_4_a5/}
}