Selfdistributive groupoids. Part A1. Non-indempotent left distributive groupoids Tomáš Kepka, Petr Němec (2003) Acta Universitatis Carolinae. Mathematica et Physica Similarity:
Selfdistributive groupoids of small orders Jaroslav Ježek, Tomáš Kepka (1997) Czechoslovak Mathematical Journal Similarity: After enumerating isomorphism types of at most five-element left distributive groupoids, we prove that a distributive groupoid with less than 81 elements is necessarily medial.