TY - JOUR AU - Vejvoda, Otto TI - On the periodic solution of a quasi-linear non-autonomous system JO - Czechoslovak Mathematical Journal PY - 1961 SP - 62 EP - 75 VL - 11 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1961.100443/ DO - 10.21136/CMJ.1961.100443 LA - en ID - 10_21136_CMJ_1961_100443 ER -