@article{AL_1992_31_5_a4,
     author = {V. T. Filippov},
     title = {On the symmetric invariant bilinear form of the $J$-ideal of},
     journal = {Algebra i logika},
     pages = {538--559},
     publisher = {mathdoc},
     volume = {31},
     number = {5},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_1992_31_5_a4/}
}