Introduction 3 of 5
Since von Neumann, several researchers have carried out work related to the theory and practice of physical self-replication. For information about some of this work visit Moshe Sipper's artificial self-replication page.
In 2004, Freitas and Merkle published a comprehensive book about physical self-replication. Details can be found here.
See the links page for web links to other work related to self-replication.