"undefined reference" to static member of template class accessed from static method

I have a static class method that needs access to a pointer MyTypePointer that therefore has to be declared static. Since it is a template class I have to put the methods inside the header file but I can't define MyTypePointer in the header.

So I get the "undefined Reference" error since MyTypePointer is not declared. How can I make this work / declare MyTypePointer.

myclass.h

template <typename A, typename B>
class PathfindingClass {
    typedef std::vector<GenericEdgeClass<A, B>*> MyType;
    static MyType *MyTypePointer;
};

template <typename A, B>
void MyClass<A, B>::MyMethod(int x, int y) { 
    //do something with MyTypePointer
}

Thank you very much.