@article{PORMA_1980__39_1-4_115449,
     author = {Abad, Manuel and Monteiro, Luiz},
     title = {Monadic epimorphisms and applications},
     journal = {Portugaliae mathematica},
     pages = {525--538},
     publisher = {mathdoc},
     volume = {39},
     number = {1-4},
     year = {1980},
     mrnumber = {0776261},
     zbl = {0554.06012},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1980__39_1-4_115449/}
}