@article{10_14708_ma_v14i27_1662,
     author = {P. R. Halmos},
     title = {BDF or the infinite principal axis theorem},
     journal = {Mathematica Applicanda},
     pages = { 5--19},
     publisher = {mathdoc},
     volume = {14},
     number = {27},
     year = {1986},
     doi = {10.14708/ma.v14i27.1662},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/ma.v14i27.1662/}
}