The authorship of work and the authorship of scientific findings do not always go together. Although the law on higher education and science introduces that popularly repeated Iine. According to that regulation, a misappropriation of the authorship of a substantial part of a copyrightable work or of the authorship of a substantial scientific finding provides grounds for the withdrawal of a scientific degree. Copyright law establishes rules under which a person who commits plagiarism can be held liable in civil and criminal court. Not only at the stage (ex post) of the withdrawal of a scientific degree and the redress of copyright infringement (e.g. retraction of an article, compensation), but even at the stage of the creation (ex ante) of scientific content one should achieve the conditions of research integrity regarding the use of one’s own and third party scientific works. Aside from the use of plagiarism checker software, we need to educate the next generations of scientists, disseminate appropriate rules of co-authorship (code of ethics for scientific research) and act against any attempts of falsifying research. In addition to plagiarism, this article also discusses the rules of citation and co-authorship.