@article{weko_18606_1, author = "Tatsuya,Akutsu and Hiroki,Arimura and Shinichi,Shimozono", title = "Hardness Results on Local Multiple Alignment of Biological Sequences", journal = "IPSJ Transactions on Bioinformatics (TBIO)   ", year = "2007", volume = "48", number = "SIG5(TBIO2)", pages = "30--38", month = "mar" }