@article{EXMATH_2000_2000_1_a24,
     author = {Urquiza Salgado, Rosa and Gonz\'alez Mastrapa, Henry},
     title = {Radio de estabilidad real de sistemas bidimensionales para perturbaciones lineales dependientes del tiempo.},
     journal = {Extracta mathematicae},
     pages = {531-545},
     publisher = {mathdoc},
     volume = {15},
     number = {3},
     year = {2000},
     language = {es},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_2000_2000_1_a24/}
}