@article{10_4064_fm_81_4_343_358,
     author = {Roman Sikorski},
     title = {Quasi-inverses of morphisms},
     journal = {Fundamenta Mathematicae},
     pages = {343--358},
     publisher = {mathdoc},
     volume = {81},
     number = {4},
     year = {1973},
     doi = {10.4064/fm-81-4-343-358},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-81-4-343-358/}
}