@misc{10_4153_CJM_1969_034_2,
     title = {Partition {Relations} for {Ordinal} {Numbers}},
     journal = {Canadian journal of mathematics},
     pages = {317--334},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-034-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-034-2/}
}