@techreport{oai:nistep.repo.nii.ac.jp:00004167,
 author = {羽田, 尚子 and 伊藤, 恵子 and 米谷, 悠},
 title = {Modes of International Activities and the Innovativeness of Firms: An Empirical Analysis Based on the Japanese National Innovation Surveys for 2003 and 2009}
}