@article{ADM_2008_4_a2,
     author = {Vitaliy M. Bondarenko and Olena M. Tertychna},
     title = {On tame  semigroups generated by idempotents with partial null multiplication},
     journal = {Algebra and discrete mathematics},
     pages = {15--22},
     publisher = {mathdoc},
     number = {4},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2008_4_a2/}
}