TY - JOUR AU - Grossinho, M.R. AU - Ma, T.F. TI - Symmetric equilibria for a beam with a nonlinear elastic foundation. JO - Portugaliae mathematica PY - 1994 SP - 375 EP - 393 VL - 51 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/PORMA_1994__51_3_47172/ LA - en ID - PORMA_1994__51_3_47172 ER -