@ARTICLE{
author={Djapic Petar Dj,Jezek Jaroslav,Markovic Petar V},
year={2010},
title={Star-Quasilinear Equational Theories of Groupoids},
journal={STUDIA SCIENTIARUM MATHEMATICARUM HUNGARICA},
volume={47},
number={2},
pages={267-288},
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},
}