2 citations to https://www.mathnet.ru/rus/lma1

1. Ralph John L. de la Cruz, Kae Mark T. Domingo, “On Trace Zero Symplectic Matrices”, Linear Algebra and its Applications, 2025  
2. Dennis I. Merino, Agnes T. Paras, Jenny R. Salinasan, “The ϕ polar decomposition when S is skew-symmetric”, Linear Algebra and its Applications, 703 (2024), 173