TY - JOUR AU - L. Erbe TI - Stability and periodicity for linear differential equations with periodic coefficients JO - Annales Polonici Mathematici PY - 1975 SP - 131 EP - 140 VL - 31 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/ap-31-2-131-140/ DO - 10.4064/ap-31-2-131-140 LA - en ID - 10_4064_ap_31_2_131_140 ER -