S. M. S. Nabavi Sales, “On mappings which approximately preserve angles”, Aequat. Math., 92, no. 6, 2018, 1079
Mohammad Sal Moslehian, Ali Zamani, “Characterizations of Operator Birkhoff–James Orthogonality”, Can. math. bull., 60, no. 4, 2017, 816
Mahdi Dehghani, Ali Zamani, “Characterization of real inner product spaces by Hermite–Hadamard type orthogonalities”, Journal of Mathematical Analysis and Applications, 479, no. 1, 2019, 1364
Ali Zamani, “The operator-valued parallelism”, Linear Algebra and its Applications, 505, 2016, 282
MOHAMMAD SAL MOSLEHIAN, ALI ZAMANI, PAWEŁ WÓJCIK, “APPROXIMATELY ANGLE PRESERVING MAPPINGS”, Bull. Aust. Math. Soc., 99, no. 03, 2019, 485
Paweł Wójcik, Ali Zamani, “Orthogonality Hilbert 𝒜-modules and operators preserving multi-𝒜-linearity”, Linear and Multilinear Algebra, 70, no. 21, 2022, 6176
Ali Zamani, Mohammad Sal Moslehian, “An extension of orthogonality relations based on norm derivatives”, The Quarterly Journal of Mathematics, 70, no. 2, 2019, 379
Ali Zamani, Mahdi Dehghani, Ulam Type Stability, 2019, 469
Ateyeh Saraei, Maryam Amyari, “Approximately orthogonality preserving maps in Krein spaces”, Aequat. Math., 94, no. 1, 2020, 137
Ali Khalili, Maryam Amyari, “$\mathcal{A}$-valued norm parallelism in Hilbert $\mathcal{A}$-modules”, AIMS Mathematics, 4, no. 3, 2019, 527