%0 Journal Article %A N. S. Temirbulatov %T A~spectral problem related to the $P_1$-approximation by spherical harmonics for the nonstationary one-velocity transport equation %J Matematičeskie zametki %D 1996 %P 472-476 %V 59 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1996_59_3_a21/ %G ru %F MZM_1996_59_3_a21