Infrastructuring the Digital Public Sphere

 J. Cohen, here. 

The valuation of unprotected works: A case study of public domain photopraphs on Wikipedia

P. Heald, M. Kretschmer, K. Erickson, here. 

Moral Rights v. Free Speech

B. Hugenholtz, Presentation here.

Enclosing the public domain: The restriction of public domain books in a digital environment

A. Clark, B. Chawner, here.

The Digital Public Domain: Foundations for an Open Culture

M. Dulong de Rosnay and J. De Martin, here.