@article{weko_3311_1,
   author	 = "内平,直志 and 平石,邦彦 and 青山,幹雄",
   title	 = "ペトリネットは便利な道具",
   journal	 = "情報処理",
   year 	 = "1998",
   volume	 = "39",
   number	 = "1",
   month	 = "jan"
}