TY - BOOK AU - Grossinho,M.R.,et al ED - Ramos, M ED - Rebelo, C ED - Sanchez, L TI - Nonlinear analysis & its applications to differential equations T2 - PNLDE 43 SN - 9780817641887 U1 - 6.01+6.07+6.03 PY - 2001/// CY - Boston PB - Birkhauser-Verlag ER -