@article{10_4153_CMB_1975_079_9,
     author = {Gould, Matthew},
     title = {An {Equational} {Spectrum} {Giving} {Cardinalities} of {Endomorphism} {Monoids1}},
     journal = {Canadian mathematical bulletin},
     pages = {427--429},
     year = {1975},
     volume = {18},
     number = {3},
     doi = {10.4153/CMB-1975-079-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1975-079-9/}
}