Calculating Magnetic Forces: Theory and Methods

[A.M.K]

Hello,

I am trying to calculate the forces between two magnets and i need some good background in theory and maths (i am struggle with maths ). I found some materials on internet but i can not understand yet!
Exactly, i have two magnets where the one is stationary and the other is moving and i am interesting to caclulate the forces between the two magnets by using two methods:
1) the energy method
2) the Maxwell stress tensor

So, does anyone can suggest me any good materials, e.g. articles, websites, etc

Thanks in advance

Kind Regards

 

[A.M.K]

Anybody?