Hegel's Ontological Argument?

I provide no example of a ‘Hegelian’ ontological argument because I know of no formulation of such an argument. Many people assert that Hegel provided an ontological argument; but, when pressed for a list of the premises of the argument, Hegel's friends fail to deliver. Here, in my view, they follow Hegel's own precedent: his lectures on ‘the ontological argument’ are full of assertions that there is a successful ontological argument, but he gives no argumentative support for those assertions, not any indication of what the premises of the target argument might be.--Graham Oppy writing in the Stanford Encyclopedia of Philosophy. [HT to Jon Shaheen.]

Would somebody be willing to offer an argument-sketch of Hegel's argument (with references to Hegel's text)? Of course, if you are drawing on other folk, do provide detailed references!