@article{JCEM_2014_1_2_a3,
     author = {A. Favini},
     title = {Perturbation methods for inverse problems related to degenerate differential equations},
     journal = {Journal of computational and engineering mathematics},
     pages = {32--44},
     publisher = {mathdoc},
     volume = {1},
     number = {2},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JCEM_2014_1_2_a3/}
}