위키백과, 우리 모두의 백과사전.
- Højbjerg, Martin (2011–2014). Norse Mythology: Items of the Gods and Goddesses. Norse Mythology. 2014년 6월 17일에 확인. “Mjölnir is one of the most fearsome weapons, capable of leveling mountains. Thor's hammer can hit any target. After the target is hit, the hammer will return to Thor's right hand all by itself. The hammer can send out lightning bolts.”
- Campbell, Hank (2013년 2월 19일). Is Thor Mighty Or Just Magic?. Science 2.0. 2014년 6월 17일에 확인. “Science 2.0 fave Dr. Neil Tyson recently tried to bring back the 'Thor is really strong' concept by stating 'If Thor's hammer is made of neutron-star matter, implied by legend, then it weighs as much as a herd of 300-billion elephants' which means only someone really strong could lift it. Of course, it also means it would be changing Earth's gravitational field...”
- Barnett, Laura, "Another View on Thor: Hammer supplier Amanda Coffman sizes up the mystical properties of Mjölnir in Kenneth Branagh's Thor", 《Guardian News and Media》, 2011년 5월 22일 작성. 2014년 6월 17일 확인. "Mjölnir is so powerful it can level entire mountains. I can't imagine any of our hammers doing that, but some models are pretty strong: they're used for breaking up concrete, knocking paving slabs into place, and in the manufacture of cars and aeroplanes. There's a little leather strap on Thor's hammer, too, for attaching it to his wrist. I'm not sure why that's there, really. None of our hammers have that. Thor doesn't even use his."