[en] In the Gosgen oscillation experiment flux and energy spectrum of these electron antineutrinos were monitored at two distances from the reactor core (37.9 m, 45.9 m). The detector system, well shielded against cosmic radiation, is based on the detection reaction upsilonsub(e)sup(c) + p->n + esup(*) and an alternating array of liquid scintillators and He wire chambers serves as positron and neutron detectors. As signature for a good event a time and position correlation of the detected neutron and positron is required. In addition the measured position energy spectrum directly reflects the incident neutrino energies. To analyze the data in terms of oscillations, either the spectra measured in each position are compared to theoretical predictions for different oscillation parameters or a relative comparison of both measurements is performed. Allowing in the analysis a variation of 2 standard deviations for the systematic uncertainties the following limits on the oscillation parameters are obtained in a combination of the data from both measuring positions: mixing angle: [large mass param.] sin² 20 < 0.24 (90% c.l.), mass param.: [maximum mixing] Δ m² < 0.02 (eV)² (90% c.l.). (orig./HSI)