Jin Lai Eryk Dutkiewicz Ren Ping Liu 0001 Rein Vesilo Changliang Zheng Dynamic spectrum access with two channel sensing in cognitive radio networks. 1757-1762 2012 ICC https://doi.org/10.1109/ICC.2012.6364284 conf/icc/2012 db/conf/icc/icc2012.html#LaiDLVZ12