add ref for reading 4.4.
authorrekado <rekado@elephly.net>
Thu, 20 Jun 2013 02:02:04 +0000 (10:02 +0800)
committerrekado <rekado@elephly.net>
Thu, 20 Jun 2013 02:02:04 +0000 (10:02 +0800)
commitc6b941c56f70e6969f592c843c32f512be79680e
tree7e2ba226e6e841310202e0358c594f5360f2bb2d
parent6a6fe1ad3b46156966431ae88e8429f3096267f0
add ref for reading 4.4.
assignment3/references.bib