@article{10_4064_fm_112_3_187_203,
     author = {Mario Petrich},
     title = {Extensions normales de demi-groupes inverses},
     journal = {Fundamenta Mathematicae},
     pages = {187--203},
     publisher = {mathdoc},
     volume = {112},
     number = {3},
     year = {1981},
     doi = {10.4064/fm-112-3-187-203},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm-112-3-187-203/}
}