Peeron: Viking Warrior challenges the Fenris Wolf (#7015-1)
LEGO Vikings Building Set List - HobbyLark
BrickLink - Set 7021-1 : LEGO Viking Double Catapult vs. the Armoured Ofnir Dragon [Vikings] - BrickLink Reference Catalog
LEGO 7021 Viking Double Catapault vs. the Armored Ofnir Dragon | BrickEconomy
The History of the Vikings: Norse Sagas, Medieval Marauders, and Far-Flung Settlements (Audible Audio Edition): Chris R. Fee, Chris R. Fee, Learn25: Books - Amazon.com
LEGO 7018 Viking Ship vs. the Midgard Serpent | BrickEconomy