@article{M2AN_1967__1_5_57_0,
     author = {Ribi\`ere, G.},
     title = {R\'egularisation d'op\'erateurs},
     journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
     pages = {57--79},
     publisher = {Dunod},
     address = {Paris},
     volume = {1},
     number = {5},
     year = {1967},
     mrnumber = {224267},
     zbl = {0184.37003},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/M2AN_1967__1_5_57_0/}
}