memory management - C++ unique_ptr and observer pattern best practices -

i'm trying write correct c++11 application, , i'm faced problem of memory management observer design pattern.

my emitter , listeners owned same class, stored in std::unique_ptr. code think write should this:

class listener {     emitter &myemitter;      public:         listener(emitter &emiter): myemitter(emitter) {             myemitter.register(*this);         }         virtual ~listener() {             myemitter.unregister(*this);         } } class emitter {     std::vector<listener*> mylisteners;     public:         void register(listener &listener) {             mylisteners.push_back(&listener);         }         void unregister(listener &listener) {             mylisteners.erase(std::remove(mylisteners.begin(), mylisteners.end(), &listener));         } } class owner {     std::unique_ptr<listener> thelistener;     std::unique_ptr<emitter> theemitter; } 

is correct approach ?