Jianqin Zhou Wai Ho Mow Xiaoping Dai Bent Functions and Codes with Low Peak-to-Average Power Ratio for Multi-Code CDMA. 60-71 2007 conf/aaecc/2007 AAECC http://dx.doi.org/10.1007/978-3-540-77224-8_10 db/conf/aaecc/aaecc2007.html#ZhouMD07