TY - JOUR AU - Feireisl, Eduard TI - Small time-periodic solutions to a nonlinear equation of a vibrating string JO - Applications of Mathematics PY - 1987 SP - 480 EP - 490 VL - 32 IS - 6 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/AM.1987.104278/ DO - 10.21136/AM.1987.104278 LA - en ID - 10_21136_AM_1987_104278 ER -