@article{AFM_1998_23_1_a2,
     author = {Hadj  Bel Nadra Rhouma and Abderrahman Boukricha and Mahel Mosbah},
     title = {Perturbations et espaces harmoniques non lin\'eaires},
     journal = {Annales Fennici Mathematici},
     pages = {33--58},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {1998},
     language = {fr},
     url = {http://geodesic.mathdoc.fr/item/AFM_1998_23_1_a2/}
}