@article{10_21136_CPM_1986_118260,
     author = {Chow, Shui-Nee and Wang, Duo},
     title = {On the monotonicity of the period function of some second order equations},
     journal = {\v{C}asopis pro p\v{e}stov\'an{\'\i} matematiky},
     pages = {14--25},
     publisher = {mathdoc},
     volume = {111},
     number = {1},
     year = {1986},
     doi = {10.21136/CPM.1986.118260},
     mrnumber = {833153},
     zbl = {0603.34034},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/CPM.1986.118260/}
}