New integrable (3+1)-dimensional systems and contact geometry A Sergyeyev Letters in Mathematical Physics 108 (2), 359–376, 2018 | 63 | 2018 |

A simple construction of recursion operators for multidimensional dispersionless integrable systems A Sergyeyev Journal of Mathematical Analysis and Applications 454 (2), 468-480, 2017 | 63* | 2017 |

Complete set of commuting symmetry operators for the Klein-Gordon equation in generalized higher-dimensional Kerr-NUT-(A) dS spacetimes A Sergyeyev, P Krtouš Physical Review D 77 (4), 044033, 2008 | 53 | 2008 |

Ordering of two small parameters in the shallow water wave problem G Burde, A Sergyeyev J. Phys. A: Math. Theor. 46 (7), 075501, 2013 | 50 | 2013 |

The four-dimensional Martínez Alonso–Shabat equation: reductions and nonlocal symmetries OI Morozov, A Sergyeyev Journal of Geometry and Physics 85, 40-45, 2014 | 49 | 2014 |

Why nonlocal recursion operators produce local symmetries: new results and applications A Sergyeyev Journal of Physics A: Mathematical and General 38 (15), 3397, 2005 | 49 | 2005 |

Generalized Stäckel transform and reciprocal transformations for finite-dimensional integrable systems A Sergyeyev, M Błaszak Journal of Physics A: Mathematical and Theoretical 41 (10), 105205, 2008 | 44 | 2008 |

A simple way of making a Hamiltonian system into a bi-Hamiltonian one A Sergyeyev Acta Applicandae Mathematica 83, 183-197, 2004 | 43 | 2004 |

Recursion operators for dispersionless integrable systems in any dimension M Marvan, A Sergyeyev Inverse Problems 28, 025011, 2012 | 40 | 2012 |

Conservation laws and normal forms of evolution equations RO Popovych, A Sergyeyev Physics Letters A 374 (22), 2210-2217, 2010 | 39 | 2010 |

On recursion operators and nonlocal symmetries of evolution equations A Sergyeyev Proceedings of the Seminar on Differential Geometry, 159–173, 2000 | 37 | 2000 |

Central extensions of cotangent universal hierarchy:(2+ 1)-dimensional bi-Hamiltonian systems A Sergyeyev, BM Szablikowski Physics Letters A 372 (47), 7016-7023, 2008 | 32 | 2008 |

Sasa-Satsuma (complex modified Korteweg–de Vries II) and the complex sine-Gordon II equation revisited: Recursion operators, nonlocal symmetries, and more A Sergyeyev, D Demskoi Journal of mathematical physics 48, 042702, 2007 | 29* | 2007 |

Recursion operator for the stationary Nizhnik–Veselov–Novikov equation M Marvan, A Sergyeyev Journal of Physics A: Mathematical and General 36 (5), L87, 2003 | 28 | 2003 |

A strange recursion operator demystified A Sergyeyev Journal of Physics A: Mathematical and General 38 (15), L257, 2005 | 23 | 2005 |

Constructing conditionally integrable evolution systems in (1+ 1) dimensions: a generalization of invariant modules approach A Sergyeyev Journal of Physics A: Mathematical and General 35, 7653, 2002 | 23 | 2002 |

Natural coordinates for a class of Benenti systems M Błaszak, A Sergyeyev Physics Letters A 365 (1-2), 28-33, 2007 | 22 | 2007 |

Maximal superintegrability of Benenti systems M Błaszak, A Sergyeyev Journal of Physics A: Mathematical and General 38 (1), L1-L5, 2005 | 20 | 2005 |

Integrable (3+1)-dimensional systems with rational Lax pairs A Sergyeyev Nonlinear Dynamics 91 (3), 1677-1680, 2018 | 19 | 2018 |

Infinitely many nonlocal conservation laws for the ABC equation with A+B+C≠0 IS Krasil’shchik, A Sergyeyev, OI Morozov Calculus of variations and partial differential equations 55 (5), 123, 2016 | 18* | 2016 |