@article{PDML_1968__5_1_1_0,
     author = {Hudry, A.},
     title = {Sous-modules $\Sigma $ clos, sous-modules $\Sigma $-compl\'ements relatifs {Modules} $\Sigma $-quasi-injectifs},
     journal = {Publications du D\'epartement de math\'ematiques (Lyon)},
     pages = {1--35},
     publisher = {Universit\'e Claude Bernard - Lyon 1},
     volume = {5},
     number = {1},
     year = {1968},
     mrnumber = {237560},
     zbl = {0169.05103},
     language = {fr},
     url = {http://www.numdam.org/item/PDML_1968__5_1_1_0/}
}