Problem with c++ sorting of objects, vectors

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;

class Vertex {
    public:
    int id;
    vector<Vertex*> edges;
    Vertex(int id) : id(id) {}
    int get_id() const {return id;}
};

class Graph {
    public:
    vector<Vertex*> vertices;
    Graph(int V) {
        vertices.reserve(V);
    }
    void test(vector<Vertex*>& other) {
        sort(vertices.begin(), vertices.end(), [](const Vertex*& one, const Vertex*& two) {return &*one < &*two;});
        sort(other.begin(), other.end(), [](const Vertex*& one, const Vertex*& two) {return &*one < &*two;});
    }
};