Takaaki Okumura Atsushi Kurokawa Hiroo Masuda Toshiki Kanamoto Masanori Hashimoto Hiroshi Takafuji Hidenari Nakashima Nobuto Ono Tsuyoshi Sakata Takashi Sato Improvement in Computational Accuracy of Output Transition Time Variation Considering Threshold Voltage Variations. 990-997 2009 92-A IEICE Transactions 4 http://search.ieice.org/bin/summary.php?id=e92-a_4_990&category=A&year=2009&lang=E&abst= db/journals/ieicet/ieicet92a.html#OkumuraKMKHTNOSS09