@article{DAN_1982_267_5_a17,
     author = {A. A. Babich and V. I. Kuvshinov and F. I. Fedorov},
     title = {Conditions for local gauge and relativistic invariance of universal first-order nonlinear equations in the theory of fundamental interactions},
     journal = {Doklady Akademii Nauk},
     pages = {1093--1097},
     publisher = {mathdoc},
     volume = {267},
     number = {5},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1982_267_5_a17/}
}