Carlos Munuera Alonso Sepúlveda Fernando Torres Algebraic Geometry Codes from Castle Curves. 117-127 2008 ICMCTA http://dx.doi.org/10.1007/978-3-540-87448-5_13 conf/icmcta/2008 db/conf/icmcta/icmcta2008.html#MunueraST08