@techreport{weko_32775_1,
   author	 = "Crama.Y. and HammerP.L. and 茨木,俊秀",
   title	 = "強ユニモジュラ行列による集合パッキング、集合カバーおよび集合分割問題について",
   year 	 = "1988",
   institution	 = "University of Dalaware, Rutgers University, 京都大学",
   number	 = "36(1988-AL-001)",
   month	 = "may"
}