@article{700988,
     title = {Projection spectra and dimension},
     booktitle = {General Topology and its Relations to Modern Analysis and Algebra},
     series = {GDML\_Books},
     publisher = {Academia Publishing House of the Czechoslovak Academy of Sciences},
     address = {Praha},
     year = {1962},
     pages = {298-300},
     mrnumber = {MR0150725},
     zbl = {0116.39801},
     url = {http://dml.mathdoc.fr/item/700988}
}

Pasynkov, B. Projection spectra and dimension, dans General Topology and its Relations to Modern Analysis and Algebra, GDML_Books,  (1962), pp. 298-300. http://gdmltest.u-ga.fr/item/700988/