  Pulsars can be used to search for stochastic backgrounds of gravitational
waves of cosmological origin within the very low frequency band (VLF),
$10^{-7}$ to $10^{-9}$ Hz. We propose to construct a special 50 m radio
telescope. Regular timing measurements of about 10 strong millisecond pulsars
will perhaps allow the detection of gravitational waves within VLF or at least
will give a more stringent upper limits.
