FOUNDATIONS OF PHYSICS, vol.28, no.5, pp.755-762, 1998 (SCI-Expanded)
Barut's classical model of the spinning particle having external dynamical variables x and p and internal dynamical variables (z) over bar and z is taken into account. The path integrations over holomorphic spinors (z) over bar and z are discussed. This quantization gives the kernel of the relativistic particles with higher spin as well as the Dirac electron. The Green's function of the spin-n/2 particle is obtained.