@article{weko_8741_1,
   author	 = "Murotsu,Yoshisada and Taguchi,Katashi",
   title	 = "Opimization of Ship Fleet-Size",
   journal	 = "Bulletin of University of Osaka Prefecture. Series A, Engineering and natural sciences",
   year 	 = "1975",
   volume	 = "23",
   number	 = "2",
   pages	 = "177--192",
   month	 = "mar"
}