  We consider the semiclassical quantization condition for the energy of an
electron in a magnetic field in the case when the electron orbit lies on a
Fermi-surface pocket surrounding the Weyl point of a topological semimetal and
analyze the constant $\gamma$ appearing in this condition. It is shown that
this constant has the universal value, $\gamma=0$, independent of the tilt of
the Weyl spectrum. Since the constant $\gamma$ for an extremal cross section of
the Fermi surface determines the phase of quantum oscillations, this result
explains why measurements of the phase permit one to find Weyl points in
crystals even though the extremal cross section of the pocket does not pass
through this point, and the appropriate Berry phase of the orbit differs from
$\pi$.

Mesoscale and Nanoscale Physics;Other Condensed Matter