@article{SORT_2004_2004_1_a0,
     author = {Khasminskii, Rafail},
     title = {Estimaci\'on on-line no param\'etrica.},
     journal = {Sort},
     pages = {1-8},
     publisher = {mathdoc},
     volume = {28},
     number = {1},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SORT_2004_2004_1_a0/}
}