%0 Journal Article %A J., Tamarkin %T Some general problems of the theory of ordinary linear diffe-rential equations and expansion of an arbitrary function in series of funda-mental functions %J Mathematische Zeitschrift %D 1928 %P 1-54 %V 27 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZ_1928__27_167963/ %G en %F MZ_1928__27_167963