@article{FAA_2018_52_2_a1,
     author = {V. I. Zhukov},
     title = {Lagrangian {Subspaces,} {Delta-Matroids,} and {Four-Term} {Relations}},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {15--24},
     publisher = {mathdoc},
     volume = {52},
     number = {2},
     year = {2018},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_2018_52_2_a1/}
}