@article{NUMA_1982__38_132745,
     author = {F. Brezzi and J. Rappaz and P.A. Raviart},
     title = {Finite {Dimensional} {Approximation} of {Nonlinear} {Problems.} {Part} {III} : {Simple} {Bifurcation} {Points.}},
     journal = {Numerische Mathematik},
     pages = {1--30},
     publisher = {mathdoc},
     volume = {38},
     year = {1982},
     zbl = {0525.65037},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1982__38_132745/}
}