Gelfreich, Vassili, Simó, C. and Vieiro, A. (2013) Dynamics of 4 D symplectic maps near a double resonance. Physica D: Nonlinear Phenomena, Vol.243 (No.1). pp. 92-110. ISSN 0167-2789 (In Press)

Gelfreich, Vassili, Rom-Kedar, V. and Turaev, D.. (2012) Fermi acceleration and adiabatic invariants for non-autonomous billiards. Chaos: An Interdisciplinary Journal of Nonlinear Science, Vol. 22 (No. 3). 033116. ISSN 1054-1500

Betz, Volker, Gelfreich, Vassili and Theil, Florian. (2011) Oscillatory sums. The Mathematical Intelligencer, Vol.33 (No.3). pp. 110-114. ISSN 0343-6993

Gelfreich, Vassili, Rom-Kedar, Vered, Shah, Kushal and Turaev, Dmitry. (2011) Robust exponential acceleration in time-dependent billiards. Physical Review Letters, Vol.106 (No.7). Article no. 074101 . ISSN 0031-9007

Gaivão, José Pedro and Gelfreich, Vassili. (2011) Splitting of separatrices for the Hamiltonian-Hopf bifurcation with the Swift–Hohenberg equation as an example. Nonlinearity, Vol.24 (No.3). pp. 677-698. ISSN 0951-7715

Gelfreich, Vassili and Gelfreikh, N.. (2010) Unique normal forms for area preserving maps near a fixed point with neutral multipliers. Regular and Chaotic Dynamics, Vol.15 (No.2-3). pp. 300-318. ISSN 1560-3547

Gelfreich, Vassili and Turaev, D.. (2010) Universal dynamics in a neighborhood of a generic elliptic periodic point. Regular and Chaotic Dynamics, Vol.15 (No.2-3). pp. 159-164. ISSN 1560-3547

Brannstrom, Niklas, de Simone, Emiliano and Gelfreich, Vassili. (2010) Geometric shadowing in slow-fast Hamiltonian systems. Nonlinearity, Vol.23 (No.5). pp. 1169-1184. ISSN 0951-7715

Gelfreich, Vassili and Gelfreikh, Natalia. (2009) Unique resonant normal forms for area-preserving maps at an elliptic fixed point. Nonlinearity, Vol.22 (No.4). pp. 783-810. ISSN 0951-7715

Gelfreich, Vassili and Naudot, V.. (2009) Width of the homoclinic zone in the parameter space for quadratic maps. Experimental Mathematics, Vol.18 (No.4). pp. 409-427. ISSN 1058-6458

Gelfreich, Vassili and Naudot, V.. (2008) Analytic invariants associated with a parabolic fixed point in C2. Ergodic Theory and Dynamical Systems, Vol.28 (No.6). pp. 1815-1848. ISSN 0143-3857

Brännström, Niklas and Gelfreich, Vassili. (2008) Drift of slow variables in slow-fast Hamiltonian systems. Physica D: Nonlinear Phenomena, Vol.237 (No.22). pp. 2913-2921. ISSN 0167-2789

Gelfreich, Vassili and Turaev, Dmitry. (2008) Unbounded energy growth in Hamiltonian systems with a slowly varying parameter. Communications in Mathematical Physics, Volume 283 (Number 3). pp. 769-794. ISSN 0010-3616

Gelfreich, Vassili and Simó i Torres, Carles. (2008) High-precision computations of divergent asymptotic series and homoclinic phenomena. Discrete and Continuous Dynamical Systems. Series B, Vol.10 (No.2-3). pp. 511-536. ISSN 1531-3492

Butler, Leo T. and Gelfreich, Vassili. (2008) Positive-entropy geodesic flows on nilmanifolds. Nonlinearity, Vol.21 (No.7). pp. 1423-1434. ISSN 0951-7715

Gelfreich, Vassili and Turaev, Dmitry. (2008) Fermi acceleration in non-autonomous billiards. Journal of Physics A-Mathematical and Theoretical, Vol.41 (No.21). ISSN 1751-8113