Anker, Jean (1932): , pp. 177-180 i: Meisen, V.: . University Library of Copenhagen 450th Anniversary. Levin & Munksgaard, Copenhagen. Roll-Hansen, Nils (1983) The Death of Spontaneous Generation and the Birth of the Gene: Two Case Studies of Relativism. Social Studies of Science 13 (4): 481-519. Kim, Kyung-Man (1991) On the Reception of Johannsen's Pure Line Theory: Toward a Sociology of Scientific Validity. Social Studies of Science 21 (4): 649-679.