@article{10_1017_S0017089500001142,
     author = {Singerman, D.},
     title = {Automorphisms of compact non-orientable {Riemann} surfaces},
     journal = {Glasgow mathematical journal},
     pages = {50--59},
     year = {1971},
     volume = {12},
     number = {1},
     doi = {10.1017/S0017089500001142},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500001142/}
}