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2. BREZZI, F., FUJII, H., Numerical ImperfzctlonA and perturbationd In thz approximation of nonllnzar problemd, in “The Mathematics of Finite Elements and Applications IV”, MAFELAP 1981, Academic Press, New York (1982), 431–452.
3. BUZANO, E., GEYMONAT, G., POSTON, T, Post-buck JUng bzhavlour of a nontinearly hypzrztou£ic thln rod mXh croAA-Azctlon Invariant under thz dlhzdral group Vnto appear.
4. GEYMONAT, G., RAUGEL, G., Vlnctz dUmznonal approximation of omz bifurcation problemd arulng In thz buckLing of rodd uiitJi Ayrmztrlzd, to appear.
5. GEYMONAT, G., RAUGEL, G., Impzrfzctlon thzory In numzrlcat approxlmatlon of bifurcation problemd to appear.