@article{PORMA_2006__63_1_53027,
     author = {Amster, P. and C\'ardenas Alzate, P.P.},
     title = {Existence of solutions for some nonlinear beam equations.},
     journal = {Portugaliae mathematica},
     pages = {113--125},
     publisher = {mathdoc},
     volume = {63},
     number = {1},
     year = {2006},
     zbl = {1107.34010},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_2006__63_1_53027/}
}