@article{RCM_2007_41_Especial_a6,
     author = {Nikita Ratanov Universidad del Rosario and Bogot\'a},
     title = {Telegraph models of financial markets},
     journal = {Revista colombiana de matematicas},
     pages = {247--252},
     publisher = {mathdoc},
     volume = {41},
     number = {Especial},
     year = {2007},
     url = {http://geodesic.mathdoc.fr/item/RCM_2007_41_Especial_a6/}
}