How can I put an object in a vector by its adress and access it?

That code allow us to make labrary (Bibliotheque) that it has copy (Exemplaire) of books (oeuvre) when a call stocker(oeuvre , n) it has to stock a copy n time in put in a list "vector"

class Bibliotheque
{
    private:
        string nom;
        Exemplaire exemplaire; // One "Exemplaire" has declared
        vector<Exemplaire*> exemplaires { &exemplaire }; //list of pointers of "exemplaire" 
    public:
        Bibliotheque(string nom)
        :nom(nom)
        {
            cout << "La Bibliothèque " << nom << " est ouverte !" << endl;
        }

        string getNom()
        {
            return nom;
        }

        void stocker(Oeuvre &oeuvre, int n = 1)
        {
            for(int i = 0; i < n; i++)
            {
                  exemplaires.push_back(&exemplaire); //It has to be list of the same object that have the same argument "oeuvre"
                                                  //making n time that object and put it in the list
            }
        }
};