@article{EJDE_2008__2008__a40,
     author = {Gil', Michael I.},
     title = {Liapunov exponents for higher-order linear differential equations whose characteristic equations have variable real roots},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2008},
     year = {2008},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2008__2008__a40/}
}