@article{10_1017_S0017089599970659,
     author = {LAU, JOSEPH},
     title = {Free sub-bands of finitely presented bands},
     journal = {Glasgow mathematical journal},
     pages = {145--150},
     year = {1999},
     volume = {41},
     number = {1},
     doi = {10.1017/S0017089599970659},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089599970659/}
}