@article{IM_1968__5_141901,
     author = {D. BURGHELEA},
     title = {Some {Properties} of {Homotopy} {Classes} of {Maps} of {Kan} {Spectra.}},
     journal = {Inventiones mathematicae},
     pages = {1--7},
     publisher = {mathdoc},
     volume = {5},
     year = {1968},
     zbl = {0175.20104},
     url = {http://geodesic.mathdoc.fr/item/IM_1968__5_141901/}
}