1. Expropriation and inventions;Anton;American Economic Review,1994
2. Anton, J., Yao, D.A., 2000. Little Patents and Big Secrets: Managing Intellectual Property. Wharton School of Business, University of Pennsylvania.
3. Innovation and communication;Battacharya;Review of Economic Studies,1983
4. Becker, G., 1971. Economic Theory, Knopf Publishing Co., New York.
5. Bessen, J., Maskin, E., 2000. Sequential innovation, patents, imitation. Working Paper 00-01, Dept. of Economics, MIT.