@article{10_1017_S0017089500005103,
     author = {Schmidt, Garfield C.},
     title = {A characterization of normed {M-spaces}},
     journal = {Glasgow mathematical journal},
     pages = {89--92},
     year = {1983},
     volume = {24},
     number = {1},
     doi = {10.1017/S0017089500005103},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500005103/}
}