@article{10_21136_CMJ_1992_128334,
     author = {Yang, Shangjun and Barker, George P.},
     title = {Generalized {Green's} relations},
     journal = {Czechoslovak Mathematical Journal},
     pages = {211--224},
     publisher = {mathdoc},
     volume = {42},
     number = {2},
     year = {1992},
     doi = {10.21136/CMJ.1992.128334},
     mrnumber = {1179493},
     zbl = {0791.20072},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1992.128334/}
}