@article{DAN_1977_236_3_a17,
     author = {R. F. Polishchuk},
     title = {Miniphantom geometrodynamics for the space -- time $2+2$ splitting},
     journal = {Doklady Akademii Nauk},
     pages = {578--581},
     publisher = {mathdoc},
     volume = {236},
     number = {3},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_236_3_a17/}
}