THEORETICAL COMPUTER SCIENCE, vol. 491, page. 83 - 93, 2013-06-17
IEEE TRANSACTIONS ON INFORMATION THEORY, vol. 59, no. 5, page. 3256 - 3256, 2013-05
IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS, vol. E96D, no. 3, page. 723 - 726, 2013-03
IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS, vol. E96D, no. 1, page. 134 - 137, 2013-01