@article{ASUO_2005_XIII_1_a0,
     author = {P. Catan\u{a} },
     title = {Different spectra for nonlinear operators},
     journal = {Analele Universit\u{a}\c{t}ii "Ovidius" Constan\c{t}a Seria Matematic\u{a}},
     publisher = {mathdoc},
     volume = {XIII},
     number = {1},
     year = {2005},
     url = {http://geodesic.mathdoc.fr/item/ASUO_2005_XIII_1_a0/}
}