@article{ALCO_2020__3_3_637_0,
     author = {Margolis, Stuart and Rhodes, John and Silva, Pedro V.},
     title = {On the {Wilson} monoid of a pairwise balanced design},
     journal = {Algebraic Combinatorics},
     pages = {637--665},
     publisher = {MathOA foundation},
     volume = {3},
     number = {3},
     year = {2020},
     doi = {10.5802/alco.106},
     zbl = {1441.05030},
     mrnumber = {4113601},
     language = {en},
     url = {http://archive.numdam.org/articles/10.5802/alco.106/}
}