[1]
V. A. Nersesian, “POSSIBLE COMPLEXES OF THREE-DIMENSIONAL PLANES IN PROJECTIVE SPACE P6. I”, Proc. YSU A: Phys. Math. Sci., vol. 35, no. 3 (196), pp. 35–39, Oct. 2001, doi: 10.46991/PYSUA.2001.35.3.035.