TY - JOUR AU - Kalas, Josef TI - On a “Liapunov like” function for an equation $\dot z=f(t,z)$ with a complex-valued function $f$ JO - Archivum mathematicum PY - 1982 SP - 65 EP - 76 VL - 18 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/ARM_1982__18_2_a1/ LA - en ID - ARM_1982__18_2_a1 ER -