@article{10_14708_cm_v17i1_5748,
     author = {J. E. Brierly and H. Nakano},
     title = {Generalized relative spectra},
     journal = {Commentationes Mathematicae},
     pages = { 29--34},
     year = {1973},
     volume = {17},
     number = {1},
     doi = {10.14708/cm.v17i1.5748},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v17i1.5748/}
}