%0 Journal Article %A Plamen Djakov %T A short proof of the theorem of Crone and Robinson on quasi-equivalence of regular bases %J Studia Mathematica %D 1975 %P 269-271 %V 53 %N 3 %U http://geodesic.mathdoc.fr/articles/10.4064/sm-53-3-269-271/ %R 10.4064/sm-53-3-269-271 %G en %F 10_4064_sm_53_3_269_271