@ARTICLE{
author={Jezek J,Markovic Petar V,Stanovsky D},
year={2007},
title={Homomorphic images of finite subdirectly irreducible unary algebras},
journal={CZECHOSLOVAK MATHEMATICAL JOURNAL},
volume={57},
number={2},
pages={671-677},
document_type={Article},
} 

@ARTICLE{
author={Djapic Petar Dj,Jezek Jaroslav,Markovic Petar V,McKenzie Ralph,Stanovsky D},
year={2007},
title={Star-linear equational theories of groupoids},
journal={ALGEBRA UNIVERSALIS},
volume={56},
number={3-4},
pages={357-397},
document_type={Article},
}