@article{10_4064_ap103_1_4,
     author = {S. H. Saker},
     title = {Lyapunov type inequalities for a
 second order differential equation with a damping term},
     journal = {Annales Polonici Mathematici},
     pages = {37--57},
     publisher = {mathdoc},
     volume = {103},
     number = {1},
     year = {2012},
     doi = {10.4064/ap103-1-4},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap103-1-4/}
}