Tractability and learnability arising from algebras with few subpowers P Idziak, P Marković, R McKenzie, M Valeriote, R Willard SIAM Journal on Computing 39 (7), 3023-3037, 2010 | 180 | 2010 |

Varieties with few subalgebras of powers J Berman, P Idziak, P Marković, R McKenzie, M Valeriote, R Willard Transactions of the American Mathematical Society 362 (3), 1445-1473, 2010 | 134 | 2010 |

Polymorphisms, and how to use them L Barto, A Krokhin, R Willard Dagstuhl Follow-Ups 7, 2017 | 101 | 2017 |

Finitely many primitive positive clones S Burris, R Willard Proceedings of the American Mathematical Society 101 (3), 427-430, 1987 | 73 | 1987 |

Essential arities of term operations in finite algebras R Willard Discrete Mathematics 149 (1-3), 239-259, 1996 | 72 | 1996 |

Characterizations of several Maltsev conditions M Kozik, A Krokhin, M Valeriote, R Willard Algebra universalis 73 (3), 205-224, 2015 | 66 | 2015 |

A finite basis theorem for residually finite, congruence meet-semidistributive varieties R Willard The Journal of Symbolic Logic 65 (1), 187-200, 2000 | 55 | 2000 |

Testing expressibility is hard R Willard International Conference on Principles and Practice of Constraint …, 2010 | 35 | 2010 |

Natural dualities for quasivarieties generated by a finite commutative ring DM Clark, PM Idziak, LR Sabourin, C Szabó, R Willard Algebra Universalis 46 (1), 285-320, 2001 | 34 | 2001 |

The dualisability of a quasi-variety is independent of the generating algebra BA Davey, R Willard Algebra Universalis 45 (1), 103-106, 2001 | 34 | 2001 |

Residually finite, congruence meet-semidistributive varieties of finite type have a finite residual bound K Kearnes, R Willard Proceedings of the American Mathematical Society 127 (10), 2841-2850, 1999 | 34 | 1999 |

Near unanimity constraints have bounded pathwidth duality L Barto, M Kozik, R Willard 2012 27th Annual IEEE Symposium on Logic in Computer Science, 125-134, 2012 | 30 | 2012 |

Full duality among graph algebras and flat graph algebras WA Lampe, GF McNulty, R Willard Algebra Universalis 45 (2), 311-334, 2001 | 29 | 2001 |

Full does not imply strong, does it? BA Davey, M Haviar, R Willard Algebra Universalis 54 (1), 1-22, 2005 | 26 | 2005 |

New tools for proving dualizability R Willard Dualities, interpretability and ordered structures, 69-74, 1999 | 26 | 1999 |

An algebra that is dualizable but not fully dualizable J Hyndman, R Willard Journal of Pure and Applied Algebra 151 (1), 31-42, 2000 | 25 | 2000 |

Tarski’s finite basis problem via 𝐀 (𝒯) R Willard Transactions of the American Mathematical Society 349 (7), 2755-2774, 1997 | 22 | 1997 |

Structural entailment BA Davey, M Haviar, R Willard Algebra Universalis 54 (4), 397-416, 2005 | 20 | 2005 |

Varieties having Boolean factor congruences R Willard Journal of Algebra 132 (1), 130-153, 1990 | 20 | 1990 |

Equational complexity of the finite algebra membership problem GF McNulty, Z Székely, R Willard International Journal of Algebra and Computation 18 (08), 1283-1319, 2008 | 19 | 2008 |