Csákány Béla; Kearnes Keith A.: Algebras whose subalgebras and reducts are trivial. In: Acta scientiarum mathematicarum, (63) 3-4. pp. 379-381. (1997)
Kearnes Keith A.: Minimal clones with abelian representations. In: Acta scientiarum mathematicarum, (61) 1-4. pp. 59-76. (1995)