@article{10_1017_S0017089500000082, author = {Howie, J. M.}, title = {Naturally ordered bands}, journal = {Glasgow mathematical journal}, pages = {55--58}, year = {1967}, volume = {8}, number = {1}, doi = {10.1017/S0017089500000082}, url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500000082/} }