Knowledge Innovation Mechanism Based on Linkages between Core Knowledge and Periphery Knowledge: The Case of R&D Cooperation between Latecomers and Forerunners

Table 3

Evidence sources and coding.

Source code	Type	Source	Content
E1	Interviews	Managers and technical experts of Company D and Company G	Interview records and documents provided by the interviewees
E2	Documented procedures	Managers of company D and G; official websites of company D and Company G	Rules and regulations, technical manuals, operating instructions
E3	Reports and bulletin	Managers of Company D and Company G; official websites of Aviation Industry Corporation of China	Annual reports and interim reports, statistics bulletin about Chinese helicopter engine technology
E4	Publications	China national knowledge infrastructure; national press and publication administration	Papers, dissertations, and monographs about aviation industry, helicopter engine technology, and R&D cooperation