Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Okunishi Kouichi and Harada Kenji,Negative sign problem in bilinear-biquadratic chain II,Meeting Abstracts of the Physical Society of Japan,2189-0803,The Physical Society of Japan,2013,68.2.2,0,217,https://cir.nii.ac.jp/crid/1390282680967575296,https://doi.org/10.11316/jpsgaiyo.68.2.2.0_217_1