@article{10_4064_am_26_3_243_252,
     author = {R. Chouikha and F. Cuvelier},
     title = {Remarks on some monotonicity conditions for the period function},
     journal = {Applicationes Mathematicae},
     pages = {243--252},
     publisher = {mathdoc},
     volume = {26},
     number = {3},
     year = {1999},
     doi = {10.4064/am-26-3-243-252},
     zbl = {0993.37029},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/am-26-3-243-252/}
}