@article{PismaZhETF.27.473,
    title = {Canonical formalism for field theories with singular Lagrangian},
    author = {Mal'tsev, V. K.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {27},
    issue = {8},
    pages = {473},
    year = {1978},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_23745.shtml},
}