cordoba 9996.6 MHz 40 Principales Córdoba. 99.3 MHz Andalucia Informacion Córdoba. 87.6 MHz Cadena 100 Córdoba. 88.4 MHz Cadena Dial Córdoba. 102.1 MHz Cadena Dial Córdoba. 91.9The Kakeya Maximal Function and the Spherical Summation Multipliers Author(s): Antonio Cordoba Source: American Journal of Mathematics, Vol. 99, No. 1 (Feb., 1977), pp. 1-22