Hiroshi Yoshida Tadahiro Hyakudome Shojiro Ishibashi Hiroshi Ochi Kenichi Asakawa Takafumi Kasaya Takashi Saito Shogo Okamoto Study on land-to-underwater communication. 1-5 2011 WPMC http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=6081509 conf/wpmc/2011 db/conf/wpmc/wpmc2011.html#YoshidaHIOAKSO11