%0 Journal Article %A E. V. Shchepin %T On the bicompact Ponomarev--Zaitsev extension and the so-called spectral parasite %J Sbornik. Mathematics %D 1972 %P 317-326 %V 17 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/SM_1972_17_2_a10/ %G en %F SM_1972_17_2_a10