TY - JOUR T1 - Variational inequalities for the biharmonic operator with variable obstacles. JF - Ann. Mat. Pura Appl. (4) 153 (1988), 203-227 (1989) Y1 - 1988 A1 - Gianni Dal Maso A1 - Gabriella Paderni PB - SISSA Library UR - http://hdl.handle.net/1963/531 U1 - 3373 U2 - Mathematics U3 - Functional Analysis and Applications ER -