@article{10_4153_CJM_1977_048_1,
     author = {Davey, Brian A.},
     title = {Weak {Injectivity} and {Congruence} {Extension} in {Congruence-Distributive} {Equational} {Classes}},
     journal = {Canadian journal of mathematics},
     pages = {449--459},
     year = {1977},
     volume = {29},
     number = {3},
     doi = {10.4153/CJM-1977-048-1},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1977-048-1/}
}