@techreport{weko_20993_1,
   author	 = "国井利泰 and 穂鷹良介",
   title	 = "SPIRESの2つの特徴的な機能　－action BNFと変形B ? tree－",
   year 	 = "1976",
   institution	 = "東京大学, SSL",
   number	 = "25(1976-DBS-031)",
   month	 = "nov"
}