How are you supposed to disclose you wrote it? You just include the authors in the cite. You don’t write “as I(we) claimed/proved in [paper]”, you wrote “as claimed/proved in [paper]”. Who cares if you wrote it or not. It should stand by itself.
Some authors will cite themselves to try and increase their own prominence as a highly cited author, or to create the illusion of broad consensus on a topic that nobody agrees with them on.
How are you supposed to disclose you wrote it? You just include the authors in the cite. You don’t write “as I(we) claimed/proved in [paper]”, you wrote “as claimed/proved in [paper]”. Who cares if you wrote it or not. It should stand by itself.
Some authors will cite themselves to try and increase their own prominence as a highly cited author, or to create the illusion of broad consensus on a topic that nobody agrees with them on.