%0 Journal Article %A G. Sh. Guseinov %T Spectral analysis of second-order multiparameter differential equations with periodic coefficients %J Algebra i analiz %D 1993 %P 98-121 %V 5 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/AA_1993_5_4_a3/ %G ru %F AA_1993_5_4_a3