The graph isomorphism problem: its structural complexity J Kobler, U Schöning, J Torán Springer Science & Business Media, 2012 | 680 | 2012 |

The difference and truth-table hierarchies for NP J Köbler, U Schöning, KW Wagner RAIRO-Theoretical Informatics and Applications 21 (4), 419-435, 1987 | 174 | 1987 |

New collapse consequences of NP having small circuits J Köbler, O Watanabe SIAM Journal on Computing 28 (1), 311-324, 1998 | 134 | 1998 |

Turing machines with few accepting computations and low sets for PP J Köbler, U Schöning, S Toda, J Torán Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät …, 1992 | 105 | 1992 |

Graph isomorphism is low for PP J Köbler, U Schöning, J Torán Computational Complexity 2 (4), 301-330, 1992 | 92 | 1992 |

On counting and approximation J Köbler, U Schöning, J Torán Acta Informatica 26 (4), 363-379, 1989 | 89 | 1989 |

Completeness results for graph isomorphism B Jenner, J Köbler, P McKenzie, J Torán Journal of Computer and System Sciences 66 (3), 549-566, 2003 | 77 | 2003 |

Reductions to sets of low information content V Arvind, Y Han, L Hemachandra, J Köbler, A Lozano, M Mundhenk, ... International Colloquium on Automata, Languages, and Programming, 162-173, 1992 | 74 | 1992 |

On pseudorandomness and resource-bounded measure V Arvind, J Köbler Theoretical Computer Science 255 (1-2), 205-221, 2001 | 63* | 2001 |

Optimal proof systems imply complete sets for promise classes J Köbler, J Messner, J Torán Information and Computation 184 (1), 71-92, 2003 | 58 | 2003 |

The power of the middle bit of a# P function F Green, J Kobler, KW Regan, T Schwentick, J Torán Journal of Computer and System Sciences 50 (3), 456-467, 1995 | 51 | 1995 |

On Weisfeiler-Leman invariance: Subgraph counts and related graph properties V Arvind, F Fuhlbrück, J Köbler, O Verbitsky Journal of Computer and System Sciences 113, 42-59, 2020 | 44 | 2020 |

Locating P/poly optimally in the extended low hierarchy J Köbler Theoretical Computer Science 134 (2), 263-285, 1994 | 43 | 1994 |

On the power of color refinement V Arvind, J Köbler, G Rattan, O Verbitsky International Symposium on Fundamentals of Computation Theory, 339-350, 2015 | 41 | 2015 |

Approximate graph isomorphism V Arvind, J Köbler, S Kuhnert, Y Vasudev International Symposium on Mathematical Foundations of Computer Science, 100-111, 2012 | 39 | 2012 |

Interval graphs: Canonical representations in logspace J Köbler, S Kuhnert, B Laubner, O Verbitsky SIAM Journal on Computing 40 (5), 1292-1315, 2011 | 39 | 2011 |

On graph isomorphism for restricted graph classes J Köbler Conference on Computability in Europe, 241-256, 2006 | 37 | 2006 |

On resource-bounded measure and pseudorandomness V Arvind, J Köbler International Conference on Foundations of Software Technology and …, 1997 | 37 | 1997 |

On bounded truth-table, conjunctive, and randomized reductions to sparse sets V Arvind, J Köbler, M Mundhenk International Conference on Foundations of Software Technology and …, 1992 | 34 | 1992 |

On the structure of low sets [complexity classes] J Kobler Proceedings of Structure in Complexity Theory. Tenth Annual IEEE Conference …, 1995 | 32 | 1995 |