@article{M2AN_1986__20_1_25_0, author = {Demirska, Ewa}, title = {External approximation of bifurcation problems}, journal = {M2AN - Mod\'elisation math\'ematique et analyse num\'erique}, pages = {25--46}, publisher = {AFCET - Gauthier-Villars}, address = {Paris}, volume = {20}, number = {1}, year = {1986}, zbl = {0587.65041}, mrnumber = {844515}, language = {en}, url = {http://www.numdam.org/item/M2AN_1986__20_1_25_0/} }