As far as I can see these are papers that were submitted for publication several years ago. Were they actually published somewhere - because for a paper to be published it has to be submitted for peer review and approved by the peer reviewers and the editor for publication, which means that other experts in the field (peers) agree that it is worth publishing and the editor has to agree. The fact they were revised means that they were altered to answer criticisms from reviewers, but generally if they were accepted for publication it will so state, along with the date of acceptance. If these were NOT published that means they were not considered to be significant contributions to the field. Unpublished papers don't mean anything beyond the personal opinions of the authors.
