共 6 条
[1]
Accounting for the recent surge in U.S. patenting: changes in R&D expenditures; patent yields; and the high tech sector.[J].Jinyoung Kim;Gerald Marschke.Economics of Innovation and New Technology.2004, 6
[2]
企业技术能力发展论.[M].安同良著;.人民出版社.2004,