The article is subititled "An Introductory Survey", suggesting that author (Michael S. Heiser, working on his PhD at the Dept. of Hebrew and Semitic Studies, University of Wisconsin-Madison) is only scratching the surface.

It looks into some dubious ancient Sumerian translations of Sitchin's own making,

It's all beyond me, but Sitchin's lack of orthodox references in his books has always bothered me - along with the "we are descended from alien lizards" theme.