Deletion of Viking metal

Comment: Lack of sources is '''not''' an #REASON|acceptable reason for nominating an article for deletion. It is a reason to improve the article. The folk metal article originally featured '''zero''' sources until I came around and improved it to the high standard it has today. As the person who pretty much rewrote the folk metal article in its entirety, I can also state with certainty that Viking metal is not the same thing as folk metal and to merge the two article would be as ridiculous as merging heavy metal music with hard rock. Yes, there are many Viking metal bands that are also folk metal bands but there are also many that are not, including almost all the early pioneers of Viking metal like Bathory, Enslaved and Einherjer. Viking metal is a well-known and established subgenre of heavy metal music, one that is recognized by even mainstream sources like http://www.allmusic.com/cg/amg.dll?p=amg&sql=10:gifyxql5ldke allmusic and in books like http://books.google.com.au/books?id=eWRv3E59V0YC&dq this and http://books.google.com.au/books?id=9--qAVrfxukC&dq this. I've long had the intention of improving this Viking metal article but I've been busy elsewhere improving other articles
Stance: keep
Cited policy: Wikipedia:Deletion policy (WP:DEL)