2 citations to https://www.mathnet.ru/rus/tm4160

1. A. E. Teretenkov, “Memory tensor for non-Markovian dynamics with random Hamiltonian”, Mathematics, 11:18 (2023), 3854–19    
2. Teretenkov A.E., “Long-Time Markovianity of Multi-Level Systems in the Rotating Wave Approximation”, Lobachevskii J. Math., 42:10, SI (2021), 2455–2465