A. A. Glutsyuk, V. A. Kleptsyn, D. A. Filimonov, I. V. Shchurov, “On the Adjacency Quantization in an Equation Modeling the Josephson Effect”, Funktsional. Anal. i Prilozhen., 48:4 (2014), 47–64; Funct. Anal. Appl., 48:4 (2014), 272–285
V. A. Kleptsyn, D. A. Filimonov, “Structure of Groups of Circle Diffeomorphisms with the Property of Fixing Nonexpandable Points”, Funktsional. Anal. i Prilozhen., 46:3 (2012), 38–61; Funct. Anal. Appl., 46:3 (2012), 191–209
V. A. Kleptsyn, D. A. Filimonov, “Lyapunov exponents and other properties of $N$-groups”, Tr. Mosk. Mat. Obs., 73:1 (2012), 37–46; Trans. Moscow Math. Soc., 73 (2012), 29–36
Yu. S. Ilyashenko, D. A. Ryzhov, D. A. Filimonov, “Phase-lock effect for equations modeling resistively shunted Josephson junctions and for their perturbations”, Funktsional. Anal. i Prilozhen., 45:3 (2011), 41–54; Funct. Anal. Appl., 45:3 (2011), 192–203