@article{SF_1983__26_134606,
     author = {M.K. Sen and B.L. Madison and T.K. Mukherjee},
     title = {Periodic properties of groupbound semigroups {II.}},
     journal = {Semigroup forum},
     pages = {229--236},
     publisher = {mathdoc},
     volume = {26},
     year = {1983},
     zbl = {0509.20044},
     url = {http://geodesic.mathdoc.fr/item/SF_1983__26_134606/}
}