2 citations to https://www.mathnet.ru/eng/lma2

1. Siegfried M. Rump, Takeshi Ogita, “Verified Error Bounds for Matrix Decompositions”, SIAM J. Matrix Anal. Appl., 45:4 (2024), 2155  
2. Ran Gutin, “Unitary canonical forms over Clifford algebras, and an observed unification of some real-matrix decompositions”, Linear and Multilinear Algebra, 2023, 1