M Grossi - Nonlinear Analysis: Theory, Methods & Applications, 1991 - Elsevier
(1) av’ Page 1 Nonlmear Analysis, Theory, Methods & Appl,cat,ons, Vol. 17, No. 10, pp. 973-989,
1991. 0362-546X/91 $3.00+ .oO Prmted in Great Britain. ~9 1991 Pergamon Press plc …