@article{EXMATH_2001_2001_1_a16,
     author = {Thompson, G. and Prince, G. E.},
     title = {El problema inverso para lagrangianas de potencial negativo de cin\'etica plana.},
     journal = {Extracta mathematicae},
     pages = {241-248},
     publisher = {mathdoc},
     volume = {16},
     number = {2},
     year = {2001},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_2001_2001_1_a16/}
}