%0 Journal Article %A Cheng, Sui-Sun %T Nonoscillatory Solutions of x(m) = (-1)mQ(t)x %J Canadian mathematical bulletin %D 1979 %P 17-21 %V 22 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1979-003-x/ %R 10.4153/CMB-1979-003-x %F 10_4153_CMB_1979_003_x