@misc{Woronowicz_Mateusz_A,
 author={Woronowicz, Mateusz},
 howpublished={online},
 publisher={Wydawnictwo Uniwersytetu Śląskiego},
 publisher={De Gruyter Open},
 language={eng},
 title={A Note on the Square Subgroups of Decomposable Torsion-Free Abelian Groups of Rank Three},
 type={czasopismo},
 keywords={torsion-free abelian groups, associative rings, square subgroups, types},
}