  In the standard theory of neutrino oscillations it is supposed that physical
observed neutrino states $\nu_{e}, \nu_{\mu}, \nu_{\tau}$ have no definite
masses, that they are initially produced as a mixture of the $\nu_{1}, \nu_{2},
\nu_{3}$ neutrino states (are produced as a wave packet), and that neutrino
oscillations are the real ones. Then this wave packet must decompose at a
definite distance into constituent parts and neutrino oscillations must
disappear. It was shown that these suppositions lead to violation of the law of
energy and momentum conservation. An alternative scheme of neutrino
oscillations obtained within the framework of particle physics has been
considered where the above mentioned shortcomings are absent, the oscillations
of neutrinos with equal masses are the real ones, and the oscillations of
neutrinos with different masses are virtual ones. Expressions for probabilities
of neutrino transitions (oscillations) in the alternative (corrected) scheme,
are given.
