@article{weko_2027_1,
   author	 = "Kajii,Atsushi and Kojima,Hiroyuki and Ui,Takashi",
   title	 = "Cominimum additive operators",
   journal	 = "Journal of Mathematical Economics",
   year 	 = "2007",
   volume	 = "43",
   number	 = "2",
   pages	 = "218--230",
   month	 = "feb"
}