@article{PismaZhETF.50.265,
    title = {New algebra of internal symmetries of Maxwell's equations},
    author = {Kotel'nikov, G. A.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {50},
    issue = {6},
    pages = {265},
    year = {1989},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_17104.shtml},
}