Chinese Patent Information System (CIPIS) : Cailiang Y. world Patent Information 15 (2), pp. 87–88.

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 107 KB
• Volume: 15
• Category: Article
• ISSN: 0172-2190
• DOI: 10.1016/0172-2190(93)90183-w