@article{weko_177698_1,
   author	 = "Matthias,Springer and Hidehiko,Masuhara and Robert,Hirschfeld",
   title	 = "A Layer-based Approach to Hierarchical Dynamically-scoped Open Classes",
   journal	 = "情報処理学会論文誌プログラミング（PRO）",
   year 	 = "2017",
   volume	 = "10",
   number	 = "2",
   month	 = "feb"
}