共 50 条
- [44] Barriers of SCM in SMEs [J]. FRONTIERS OF MANUFACTURING AND DESIGN SCIENCE, PTS 1-4, 2011, 44-47 : 3997 - 4001
- [48] EXIT BARRIERS ARE ENTRY BARRIERS - THE DURABILITY OF CAPITAL AS A BARRIER TO ENTRY [J]. BELL JOURNAL OF ECONOMICS, 1980, 11 (02): : 721 - 729