@article{article6004a192,
title   = {Quantization of systems with time-dependent constraints. Example of a relativistic particle in a plane wave},
author = {Gavrilov, S P and Gitman, Dmitri Maximovitch},
year = {1993},
doi = {10.1088/0264-9381/10/1/008},
journal   = {Classical and Quantum Gravity}
}