@article{10_14708_wm_v19i02_3505,
     author = {L. A. Steen},
     title = {Momenty zwrotne w historii teorii spektralnej},
     journal = {Wiadomo\'sci Matematyczne},
     pages = { 141--164},
     publisher = {mathdoc},
     volume = {19},
     number = {02},
     year = {1975},
     doi = {10.14708/wm.v19i02.3505},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/wm.v19i02.3505/}
}