@article{10_4064_cm_27_2_175_176,
     author = {J. P{\l}onka},
     title = {On the arity of idempotent reduct of abelian groups},
     journal = {Colloquium Mathematicum},
     pages = {175--176},
     publisher = {mathdoc},
     volume = {27},
     number = {2},
     year = {1973},
     doi = {10.4064/cm-27-2-175-176},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-27-2-175-176/}
}