  The production of single charged and neutral intermediate vector bosons in
e+e- collisions has been studied in the data collected by the DELPHI experiment
at LEP at centre-of-mass energies between 183 and 209 GeV, corresponding to an
integrated luminosity of about 640 pb^{-1}. The measured cross-sections for the
reactions, determined in limited kinematic regions, are in agreement with the
Standard Model predictions.
