Are there any theoretical works about possiblity of self-replication of LEGO systems  ? (constraints on the size etc., computer simulations)

Ive found only that article

http://crit2007.bartlab.org/Dr.%20Jackrit%27s%20Papers/Chirikjian/Suthakorn03_a.pdf

http://www.techi.com/2010/10/mad-scientist-dooms-us-all-with-self-replicating-lego-menace-or-something

my question isnt as stupid as it looks like ;)

en.wikipedia.org/wiki/Clanking_replicator

Are there any theoretical works about possiblity of self-replication of LEGO systems? (constraints on the size etc., computer simulations)

Here are some relevent links:

Bartlab.org: PDF Document

Techi.com: Mad Scientist Dooms Us All With Self-Replicating Lego Menace

Wikipedia: Clanking replicator