Daya Kushreshtha 20210127 References to papers concerning the issue of using or not using constrained quantization for Lagrangians that are of first or second order in time derivatives of the dynamical variables D. S Kulshreshtha, H.J.W. Muller-Kirsten Faddeev-Jackiw quantization of selfdual fields doi 10.1103/PhysRevD.45.R393 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.45.R393 D. S Kulshreshtha, H.J.W. Muller-Kirsten Quantization of systems with constraints: The Faddeev-Jackiw method versus Dirac's method applied to superfields doi 10.1103/PhysRevD.43.3376 https://journals.aps.org/prd/abstract/10.1103/PhysRevD.43.3376 L.D. Faddeev, R. Jackiw, Hamiltonian Reduction of Unconstrained and Constrained Systems doi 10.1103/PhysRevLett.60.1692 https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.60.1692 U. Kulshreshtha, D. S. Kulshreshtha and J. P. Vary Hamiltonian, path integral and BRST formulations of large N scalar QCD2 on the light-front and spontaneous symmetry breaking Eur. Phys. J. C 75 (2015) 4, 174 https://link.springer.com/article/10.1140/epjc/s10052-015-3377-x