Let's say that you have two objects, a and b. Object a has the reference to object b. Object b has reference to object a. There is no other references to object a and there is no other references to object b.
I didn't get this. You are telling a has reference of ba nd b has rference of a tht means a=b and b=a . Correct me if i am wrong.
What means to other refrence in your quote, can you explain in detail little