@article{106261, author = {Jerzy P\l onka}, title = {Subdirectly irreducible groupoids in some varieties}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {024}, year = {1983}, pages = {631-645}, zbl = {0543.08007}, mrnumber = {738559}, language = {en}, url = {http://dml.mathdoc.fr/item/106261} }
Płonka, Jerzy. Subdirectly irreducible groupoids in some varieties. Commentationes Mathematicae Universitatis Carolinae, Tome 024 (1983) pp. 631-645. http://gdmltest.u-ga.fr/item/106261/
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