@article{ADM_2005_4_a2,
     author = {Gonca Ayik and Hayrullah Ayik and Yu. \"Unl\"u},
     title = {Presentations and word problem for strong semilattices of semigroups},
     journal = {Algebra and discrete mathematics},
     pages = {28--35},
     publisher = {mathdoc},
     number = {4},
     year = {2005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2005_4_a2/}
}