@article{DMGAA_2021_41_1_a8,
     author = {Lee, Edmond W.H.},
     title = {Join {Irreducible} {2-Testable} {Semigroups}},
     journal = {Discussiones Mathematicae. General Algebra and Applications},
     pages = {103--112},
     publisher = {mathdoc},
     volume = {41},
     number = {1},
     year = {2021},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGAA_2021_41_1_a8/}
}