@article{10_4153_CJM_1979_008_x,
     author = {Day, Alan},
     title = {Characterizations of {Finite} {Lattices} that are {Bounded-Homomqrphic} {Images} or {Sublattices} of {Free} {Lattices}},
     journal = {Canadian journal of mathematics},
     pages = {69--78},
     year = {1979},
     volume = {31},
     number = {1},
     doi = {10.4153/CJM-1979-008-x},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1979-008-x/}
}