TY - JOUR AU - V. I. Zhukov TI - Lagrangian Subspaces, Delta-Matroids, and Four-Term Relations JO - Funkcionalʹnyj analiz i ego priloženiâ PY - 2018 SP - 15 EP - 24 VL - 52 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/FAA_2018_52_2_a1/ LA - ru ID - FAA_2018_52_2_a1 ER -