  Recently, Belhadi and al. (2014) developed a new approach to quantize
classical soluble systems based on the calculation of brackets among
fundamental variables using the constants of integration (CI method). In this
paper, we will apply this approach in some exactly soluble constrained
Hamiltonian systems. We will complete our work with some applications in
quantum field theory : Majorana neutrino, the scalar field on the light-cone,
the O(2) nonlinear sigma model and the chiral boson theory.
  Key words : Quantization, constrainted systems, field theory, soluble
systems, integration constants.
