@article{oai:repository.dl.itc.u-tokyo.ac.jp:00048963, author = {IMAI, Hiroshi and SUPPAKITPAISARN, Vorapong}, issue = {6}, journal = {IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences}, month = {Jun}, note = {Special Section LETTERĀ (Special Section on Discrete Mathematics and Its Applications)}, pages = {1216--1222}, title = {Improving Width-3 Joint Sparse Form to Attain Asymptotically Optimal Complexity on Average Case}, volume = {E98-A}, year = {2015} }