1. Empirical evidence on the validity of litigated patents;Allison;AIPLA QJ,1998
2. The business method patent myth;Allison;Berkeley Tech. LJ,2003
3. Getting the most out of your IP–patent management along its life cycle;Bader;Drug Discovery Today,2012
4. The rate of depreciation of technological knowledge: Evidence from patent renewal data;Bosworth;Economic Issues-Stoke on Trent-,2003
5. The rate of obsolescence of technical knowledge–A note;Bosworth;The Journal of Industrial Economics,1978