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Stegantseva, P. and Grechneva, M. 2024. Two-dimensional nonisotropic surfaces with flat normal connection and a nondegenerate Grassmann image of constant curvature in the Minkowski space.
Ukrains’kyi Matematychnyi Zhurnal. 76, 4 (Apr. 2024), 533–551. DOI:
https://doi.org/10.3842/umzh.v74i4.6743.