notes/pl/cpp/features/tricky.txt

refs and c-tors (const T *  is important to use const)
https://herbsutter.com/2008/01/01/gotw-88-a-candidate-for-the-most-important-const/

string f() { return "abc"; }

void g() {
string &s = f();       // still legal?
    cout << s << endl;
}