  Ginzburg-Landau expansion is derived for superconductors with the
gap-function odd over $k-k_{F}$. It is shown that in this odd-gap case
Ginzburg-Landau coefficients possess an additional dependence on the pairing
coupling constant which leads to the appropriate dependence of the physical
properties. Non-magnetic impurities influence the odd-gap pairing in a
significant way and the mechanism of this influence is quite different from
that predicted by the usual theory of "dirty" superconductors. In particular
this is reflected in an anomalous behavior of the upper critical field $H_{c2}$
slope close to $T_{c}$. We also derive the complete temperature dependence of
$H_{c2}$ for the odd-gap case.
