Hangeland insists his team-mates need to dig back into the bottom club's history to learn how they can do it again.
He said: "The only thing that will pull us out of this situation is hard work and belief that we can do it.
"We have to stop feeling sorry for ourselves, and the situation we are in now, and everyone needs to recognise that and pull in the same direction.
"We are under a lot of pressure. Everyone can read the league table. But we have to try and pick ourselves up as soon as possible.
"That year when we survived, we slowly turned the ship round in the quality of training and the belief that we could do it. We had a system and bunch of players who followed it.
"That is obviously an example that we need to try and replicate. There is one way and that is to fight together as a group."
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