C++ :: Access Other Members Within Same Nested Class?

It's hard to give a precise title but here is the question in detail: I have a class, something like this:

Code:
class classA{
public:
void fnA();
...
};

and another class that contains objects of classA:

Code:
class classB{
public:
classA A1;
classA A2;
classA A3;
vector<classA*> vA;
...
};
classB B1;

Now is it possible to access B1.vA from B1.A1.fnA() through some kind of pointer chain like this->parent->vA ? If so