@article{EXMATH_1987_1987_1_a16,
     author = {Mart{\'\i}nez-Maurica, Javier and Pell\'on, Teresa},
     title = {Centros de {Chebyshev} en espacios ultram\'etricos},
     journal = {Extracta mathematicae},
     pages = {59-61},
     publisher = {mathdoc},
     volume = {2},
     number = {2},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EXMATH_1987_1987_1_a16/}
}