Can I publish my technical paper on more than one publishing sites? The paper content is the same while only the formats differ. I am the author of the paper.
The only formal process that I'm aware of is the reprint mechanism. You publish a piece of work. Sometime later, editors of a compendium or collection wish to take your article and reprint it. In that case, the original publishers have to approve this (as well as you of course).
More commonly, papers published in a peer-reviewed venue might also appear in a Ph.D dissertation in some form. Here again, there's some form of copyright approval needed for it to happen.