  We compare various formalisms for neutral particles. It is found that they
contain unexplained contradictions. Next, we investigate the spin-1/2 and
spin-1 cases in different bases. Next, we look for relations with the
Majorana-like field operator. We show explicitly incompatibility of the
Majorana anzatzen with the Dirac-like field operators in both the original
Majorana theory and its generalizations. Several explicit examples are
presented for higher spins too. It seems that the calculations in the helicity
basis only give mathematically and physically reasonable results.
