@techreport{weko_142304_1,
   author	 = "Kazuya,Haraguchi",
   title	 = "A Collection of Efficient Local Searches for Partial Latin Square Extension Problem and Its Variants",
   year 	 = "2015",
   institution	 = "Faculty of Commerce, Otaru University of Commerce",
   number	 = "4",
   month	 = "jun"
}