@article{10_4153_S0008414X21000675,
     author = {Barmak, Jonathan Ariel},
     title = {Invariants for metabelian groups of prime power exponent, colorings, and stairs},
     journal = {Canadian journal of mathematics},
     pages = {267--297},
     year = {2023},
     volume = {75},
     number = {1},
     doi = {10.4153/S0008414X21000675},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/S0008414X21000675/}
}