I do not know where one might find it, but Fr. Ricossa wrote an entire book about J23. Some of it was translated into English and published, as a series of articles, in a now-defunct periodical called Sacerdotium. I believe the title was The Pope of the Council. It contained some pretty damning evidence, most of which was culled from biographers favorable to Roncalli. The articles used to be online, but I do not know if that is still the case.