@article{SF_1984__30_134709,
     author = {G.A. Fraser and A.M. Bell},
     title = {The word problem in the tensor product of distributive semilattices.},
     journal = {Semigroup forum},
     pages = {117--120},
     publisher = {mathdoc},
     volume = {30},
     year = {1984},
     zbl = {0528.06007},
     url = {http://geodesic.mathdoc.fr/item/SF_1984__30_134709/}
}