@article{SF_1978__16_134286,
     author = {K.D. jr. Magill},
     title = {Green's {J-relation} for polynomials.},
     journal = {Semigroup forum},
     pages = {165--182},
     publisher = {mathdoc},
     volume = {16},
     year = {1978},
     zbl = {0386.20043},
     url = {http://geodesic.mathdoc.fr/item/SF_1978__16_134286/}
}