TY - JOUR AU - Fonda, Alessandro AU - Ramos, Miguel AU - Willem, Michael PY - 1993/03/01 Y2 - 2024/03/29 TI - Subharmonic solutions for second order differential equations JF - Topological Methods in Nonlinear Analysis JA - TMNA VL - 1 IS - 1 SE - DO - UR - https://apcz.umk.pl/TMNA/article/view/TMNA.1993.007 SP - 49 - 66 AB - NO ABSTRACT ER -