Serialize Object derived from UnityEngine.Object

Hi everybody,

I read a lot of topic about that, but still not clear about the possibility to do a serialization.

On this thread :
http://answers.unity3d.com/questions/1559/edit-and-continue-scripting-destroys-current-state/1583#1583

Lucas meijer say that GameObject are serializable.
Acutally I try to serialized a class which derive from UnityEngine.Object or/and which include a GameObject.

Does someone now if it’s definitly impossible or how to do that.
Would be great, thx.
Kind Regards.

Well, actually I suppose it’s a mistake from the Unity Developper and the only classes which are supposed to be serialized are to folliwing ones :