Hempel, Carl G.2017-02-242017-02-241958Concepts, theories, and the mind-body problem. Minnesota studies in the philosophy of science, Volume 2 (1958), page 37-98https://hdl.handle.net/11299/1846211 online resource (PDF, page 37-98)enThe theoretician's dilemma: a study in the logic of theory constructionArticle