  We calculate the extremal cross sectional areas and cyclotron masses for the
Fermi-surface pockets in Dirac and Weyl topological semimetals. The calculation
is carried out for the most general form of the electron energy bands in the
vicinity of the Weyl and Dirac points. Using the obtained formulas, one can
find parameters characterizing the Dirac and Weyl electrons in the topological
semimetals from appropriate experimental data. As an example, we consider the
W1 electrons in TaAs.
