@article{10_4153_CJM_1967_029_1,
     author = {Fujiwara, Tsuyoshi},
     title = {Permutability of {Semilattice} {Congruences} on {Lattices}},
     journal = {Canadian journal of mathematics},
     pages = {370--375},
     year = {1967},
     volume = {19},
     number = {1},
     doi = {10.4153/CJM-1967-029-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1967-029-1/}
}